WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.04CB2
Distribution Date: 12/27/2004

Class	Cusip	Orig Prin Bal	Begin Prin Bal	Int Rate Accrued	Int Rate Paid	Int Dist	Prin Dist	Int Shortfall	PPIS	Uncomp Int Shortfall	Prin Loss	Deferred Interest	Int Reimbursed	Unsched Int	Prin Reimbursed	Subsequent Recoveries	Total Dist	Ending Class Bal
IA	92922FTW8	$27,793,587.00	$26,230,716.24	5.0000000000%	5.0000000000%	$109,294.65	$32,108.99	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$141,403.64	$26,198,607.25
IIA	92922FTX6	$80,272,386.00	$77,471,373.42	5.5000000000%	5.5000000000%	$355,077.13	$1,303,186.67	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$1,658,263.80	$76,168,186.75
IIIA	92922FTY4	$81,301,890.00	$77,266,979.14	6.0000000000%	6.0000000000%	$386,334.90	$993,008.24	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$1,379,343.13	$76,273,970.90
IVA	92922FTZ1	$32,477,243.00	$30,905,629.62	6.5000000000%	6.5000000000%	$167,405.49	$862,446.63	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$1,029,852.12	$30,043,182.99
VA	92922FUA4	$35,154,145.00	$33,980,219.67	5.0000000000%	5.0000000000%	$141,584.25	$388,162.49	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$529,746.74	$33,592,057.18
VIA	92922FUB2	$13,834,712.00	$13,271,397.51	4.5000000000%	4.5000000000%	$49,767.74	$221,971.15	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$271,738.89	$13,049,426.36
VIIA	92922FUC0	$33,654,547.00	$32,015,445.93	5.5000000000%	5.5000000000%	$146,737.46	$497,993.11	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$644,730.57	$31,517,452.82
CX	92922FUD8	$6,178,097.00	$5,836,303.69	5.5000000000%	5.5000000000%	$26,749.73	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$26,749.73	$5,708,068.29
DX	92922FUE6	$3,455,424.00	$3,288,790.76	5.0000000000%	5.0000000000%	$13,703.29	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$13,703.29	$3,248,774.73
B1	92922FUF3	$9,306,086.00	$9,226,781.26	5.5932521336%	5.5932521336%	$43,006.43	$16,177.60	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$59,184.03	$9,210,603.66
B2	92922FUG1	$4,244,881.00	$4,208,706.91	5.5932521336%	5.5932521336%	$19,616.97	$7,379.26	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$26,996.22	$4,201,327.65
B3	92922FUH9	$2,612,234.00	$2,589,973.03	5.5932521336%	5.5932521336%	$12,071.98	$4,541.08	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$16,613.06	$2,585,431.95
B4	92922FUK2	$2,612,234.00	$2,589,973.03	5.5932521336%	5.5932521336%	$12,071.98	$4,541.08	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$16,613.06	$2,585,431.95
B5	92922FUL0	$1,959,176.00	$1,942,480.26	5.5932521336%	5.5932521336%	$9,053.98	$3,405.81	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$12,459.80	$1,939,074.45
B6	92922FUM8	$1,306,122.93	$1,294,992.39	5.5932521336%	5.5932521336%	$6,036.02	$2,270.49	$0.00	$0.00	$0.00	$0.07	$0.00	$0.00	$0.00	$0.00	$0.00	$8,306.51	$1,292,721.83
R	92922FUJ5	$100.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
R_SYN	XXXXXXXXX	$0.00	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Total		$326,529,343.93	$312,994,668.41			$1,498,511.99	$4,337,192.59	$0.00	$0.00	$0.00	$0.07	$0.00	$0.00	$0.00	$0.00	$0.00	$5,835,704.58	$308,657,475.75

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.04CB2
Distribution Date: 12/27/2004

Class	Orig Face	Beg Bal	Prin Loss	Prin Reimbursed	Subsequent Recoveries	Deferred Interest	Total Prin	End Cert Pct	End Cert Bal
IA	$27,793,587.00	$26,230,716.24	$0.00	$0.00	$0.00	$0.00	$32,108.99	0.9426133896	$26,198,607.25
IIA	$80,272,386.00	$77,471,373.42	$0.00	$0.00	$0.00	$0.00	$1,303,186.67	0.9488715927	$76,168,186.75
IIIA	$81,301,890.00	$77,266,979.14	$0.00	$0.00	$0.00	$0.00	$993,008.24	0.9381574143	$76,273,970.90
IVA	$32,477,243.00	$30,905,629.62	$0.00	$0.00	$0.00	$0.00	$862,446.63	0.9250533671	$30,043,182.99
VA	$35,154,145.00	$33,980,219.67	$0.00	$0.00	$0.00	$0.00	$388,162.49	0.9555646192	$33,592,057.18
VIA	$13,834,712.00	$13,271,397.51	$0.00	$0.00	$0.00	$0.00	$221,971.15	0.9432380204	$13,049,426.36
VIIA	$33,654,547.00	$32,015,445.93	$0.00	$0.00	$0.00	$0.00	$497,993.11	0.9364990954	$31,517,452.82
CX	$6,178,097.00	$5,836,303.69	$0.00	$0.00	$0.00	$0.00	$0.00	0.9239201473	$5,708,068.29
DX	$3,455,424.00	$3,288,790.76	$0.00	$0.00	$0.00	$0.00	$0.00	0.9401956837	$3,248,774.73
B1	$9,306,086.00	$9,226,781.26	$0.00	$0.00	$0.00	$0.00	$16,177.60	0.9897397961	$9,210,603.66
B2	$4,244,881.00	$4,208,706.91	$0.00	$0.00	$0.00	$0.00	$7,379.26	0.9897397948	$4,201,327.65
B3	$2,612,234.00	$2,589,973.03	$0.00	$0.00	$0.00	$0.00	$4,541.08	0.9897397974	$2,585,431.95
B4	$2,612,234.00	$2,589,973.03	$0.00	$0.00	$0.00	$0.00	$4,541.08	0.9897397974	$2,585,431.95
B5	$1,959,176.00	$1,942,480.26	$0.00	$0.00	$0.00	$0.00	$3,405.81	0.9897397937	$1,939,074.45
B6	$1,306,122.93	$1,294,992.39	$0.07	$0.00	$0.00	$0.00	$2,270.49	0.9897397866	$1,292,721.83
R	$100.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
R_SYN	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	0.0000000000	$0.00
Total	$326,529,343.93	$312,994,668.41	$0.07	$0.00	$0.00	$0.00	$4,337,192.59	0.9452671911	$308,657,475.75

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.04CB2
Distribution Date: 12/27/2004
PER $1000 DENOMINATION
Class	Orig Face	Beg Bal	Prin Loss	Prin Reimbursed	Subsequent Recoveries	Deferred Interest	Total Prin	End Cert Pct	End Cert Bal
IA	$27,793,587.00	943.76865570	0.00000000	0.00000000	0.00000000	0.00000000	1.15526614	0.9426133896	942.61338956
IIA	$80,272,386.00	965.10615020	0.00000000	0.00000000	0.00000000	0.00000000	16.23455755	0.9488715927	948.87159265
IIIA	$81,301,890.00	950.37125385	0.00000000	0.00000000	0.00000000	0.00000000	12.21383956	0.9381574143	938.15741430
IVA	$32,477,243.00	951.60878095	0.00000000	0.00000000	0.00000000	0.00000000	26.55541389	0.9250533671	925.05336706
VA	$35,154,145.00	966.60634671	0.00000000	0.00000000	0.00000000	0.00000000	11.04172751	0.9555646192	955.56461919
VIA	$13,834,712.00	959.28252861	0.00000000	0.00000000	0.00000000	0.00000000	16.04450819	0.9432380204	943.23802042
VIIA	$33,654,547.00	951.29629675	0.00000000	0.00000000	0.00000000	0.00000000	14.79720140	0.9364990954	936.49909535
CX	$6,178,097.00	944.67660349	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.9239201473	923.92014726
DX	$3,455,424.00	951.77632615	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.9401956837	940.19568366
B1	$9,306,086.00	991.47818535	0.00000000	0.00000000	0.00000000	0.00000000	1.73838926	0.9897397961	989.73979609
B2	$4,244,881.00	991.47818514	0.00000000	0.00000000	0.00000000	0.00000000	1.73839031	0.9897397948	989.73979483
B3	$2,612,234.00	991.47818687	0.00000000	0.00000000	0.00000000	0.00000000	1.73838944	0.9897397974	989.73979743
B4	$2,612,234.00	991.47818687	0.00000000	0.00000000	0.00000000	0.00000000	1.73838944	0.9897397974	989.73979743
B5	$1,959,176.00	991.47818266	0.00000000	0.00000000	0.00000000	0.00000000	1.73838900	0.9897397937	989.73979367
B6	$1,306,122.93	991.47818345	0.00005359	0.00000000	0.00000000	0.00000000	1.73834327	0.9897397866	989.73978659
R	$100.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000
R_SYN	$0.00	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.0000000000	0.00000000

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.04CB2
Distribution Date: 12/27/2004

Class	Orig Face	Int Rate Accrued	Int Rate Paid	Beg Cert Prin/Not Bal	Current Int Accrued	Int Shortfall	PPIS	Uncompensated Int Shortfall	Unscheduled Int	Int Reimbursed	Total Int Dist
IA	$27,793,587.00	5.0000000000%	5.0000000000%	$26,230,716.24	$109,294.65	$0.00	$0.00	$0.00	$0.00	$0.00	$109,294.65
IIA	$80,272,386.00	5.5000000000%	5.5000000000%	$77,471,373.42	$355,077.13	$0.00	$0.00	$0.00	$0.00	$0.00	$355,077.13
IIIA	$81,301,890.00	6.0000000000%	6.0000000000%	$77,266,979.14	$386,334.90	$0.00	$0.00	$0.00	$0.00	$0.00	$386,334.90
IVA	$32,477,243.00	6.5000000000%	6.5000000000%	$30,905,629.62	$167,405.49	$0.00	$0.00	$0.00	$0.00	$0.00	$167,405.49
VA	$35,154,145.00	5.0000000000%	5.0000000000%	$33,980,219.67	$141,584.25	$0.00	$0.00	$0.00	$0.00	$0.00	$141,584.25
VIA	$13,834,712.00	4.5000000000%	4.5000000000%	$13,271,397.51	$49,767.74	$0.00	$0.00	$0.00	$0.00	$0.00	$49,767.74
VIIA	$33,654,547.00	5.5000000000%	5.5000000000%	$32,015,445.93	$146,737.46	$0.00	$0.00	$0.00	$0.00	$0.00	$146,737.46
CX	$6,178,097.00	5.5000000000%	5.5000000000%	$5,836,303.69	$26,749.73	$0.00	$0.00	$0.00	$0.00	$0.00	$26,749.73
DX	$3,455,424.00	5.0000000000%	5.0000000000%	$3,288,790.76	$13,703.29	$0.00	$0.00	$0.00	$0.00	$0.00	$13,703.29
B1	$9,306,086.00	5.5932521336%	5.5932521336%	$9,226,781.26	$43,006.43	$0.00	$0.00	$0.00	$0.00	$0.00	$43,006.43
B2	$4,244,881.00	5.5932521336%	5.5932521336%	$4,208,706.91	$19,616.97	$0.00	$0.00	$0.00	$0.00	$0.00	$19,616.97
B3	$2,612,234.00	5.5932521336%	5.5932521336%	$2,589,973.03	$12,071.98	$0.00	$0.00	$0.00	$0.00	$0.00	$12,071.98
B4	$2,612,234.00	5.5932521336%	5.5932521336%	$2,589,973.03	$12,071.98	$0.00	$0.00	$0.00	$0.00	$0.00	$12,071.98
B5	$1,959,176.00	5.5932521336%	5.5932521336%	$1,942,480.26	$9,053.98	$0.00	$0.00	$0.00	$0.00	$0.00	$9,053.98
B6	$1,306,122.93	5.5932521336%	5.5932521336%	$1,294,992.39	$6,036.02	$0.00	$0.00	$0.00	$0.00	$0.00	$6,036.02
R	$100.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
R_SYN	$0.00	0.0000000000%	0.0000000000%	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00	$0.00
Total	$326,529,343.93			$312,994,668.41	$1,498,511.99	$0.00	$0.00	$0.00	$0.00	$0.00	$1,498,511.99

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.04CB2
Distribution Date: 12/27/2004
PER $1000 DENOMINATION
Class	Orig Face	Int Rate Accrued	Int Rate Paid	Beg Cert Prin/Not Bal	Curent Int Accrued	Int Shortfall	PPIS	Uncompensated Int Shortfall	Unscheduled Int	Int Reimbursed	Total Int Dist
IA	$27,793,587.00	5.0000000000%	5.0000000000%	943.76865570	3.93236936	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.93236936
IIA	$80,272,386.00	5.5000000000%	5.5000000000%	965.10615020	4.42340321	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.42340321
IIIA	$81,301,890.00	6.0000000000%	6.0000000000%	950.37125385	4.75185632	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.75185632
IVA	$32,477,243.00	6.5000000000%	6.5000000000%	951.60878095	5.15454745	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	5.15454745
VA	$35,154,145.00	5.0000000000%	5.0000000000%	966.60634671	4.02752648	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.02752648
VIA	$13,834,712.00	4.5000000000%	4.5000000000%	959.28252861	3.59730943	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.59730943
VIIA	$33,654,547.00	5.5000000000%	5.5000000000%	951.29629675	4.36010801	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.36010801
CX	$6,178,097.00	5.5000000000%	5.5000000000%	944.67660349	4.32976854	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.32976854
DX	$3,455,424.00	5.0000000000%	5.0000000000%	951.77632615	3.96573329	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	3.96573329
B1	$9,306,086.00	5.5932521336%	5.5932521336%	991.47818535	4.62132308	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.62132308
B2	$4,244,881.00	5.5932521336%	5.5932521336%	991.47818514	4.62132390	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.62132390
B3	$2,612,234.00	5.5932521336%	5.5932521336%	991.47818687	4.62132412	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.62132412
B4	$2,612,234.00	5.5932521336%	5.5932521336%	991.47818687	4.62132412	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.62132412
B5	$1,959,176.00	5.5932521336%	5.5932521336%	991.47818266	4.62132039	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.62132039
B6	$1,306,122.93	5.5932521336%	5.5932521336%	991.47818345	4.62132611	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	4.62132611
R	$100.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000
R_SYN	$0.00	0.0000000000%	0.0000000000%	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000	0.00000000

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
SERIES: WAMU 04CB2
WEIGHTED AVERAGE PC RATE: 5.25197%
WEIGHTED AVERAGE MATURITY: 352.24324
WEIGHTED AVERAGE LOAN AGE: 7.08364
POOL NUMBER: 2429
ISSUE DATE: 06/23/2004
CERTIFICATE BALANCE AT ISSUE: $29,805,455.93
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	177		$28,231,401.49
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$32,093.93
Unscheduled Principal Collection/Reversals		$2,289.47
Liquidations-in-full	0	$0.00
Subsequent Recoveries		$0.00
Net principal Distributed		$34,383.40	-$34,383.40

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	177		$28,197,018.09

SCHEDULED INTEREST AT MORTGAGE RATE:		$129,440.14

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Interest Uncollected on Prepayment		$0.00
Uncompensated Uncollected Interest		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$5,881.47

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$157,942.07

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
SERIES: WAMU 04CB2
WEIGHTED AVERAGE PC RATE: 5.66339%
WEIGHTED AVERAGE MATURITY: 351.14134
WEIGHTED AVERAGE LOAN AGE: 6.99554
POOL NUMBER: 2430
ISSUE DATE: 06/23/2004
CERTIFICATE BALANCE AT ISSUE: $86,082,988.28
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	581		$83,251,819.40
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$88,455.67
Unscheduled Principal Collection/Reversals		$12,700.60
Liquidations-in-full	8	$1,208,172.17
Subsequent Recoveries		$0.00
Net principal Distributed		$1,309,328.44	-$1,309,328.44

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	573		$81,942,490.96

SCHEDULED INTEREST AT MORTGAGE RATE:		$410,250.50

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Interest Uncollected on Prepayment		$0.00
Uncompensated Uncollected Interest		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$17,344.10

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$1,702,234.84

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
SERIES: WAMU 04CB2
WEIGHTED AVERAGE PC RATE: 6.10998%
WEIGHTED AVERAGE MATURITY: 352.04377
WEIGHTED AVERAGE LOAN AGE: 6.52043
POOL NUMBER: 2431
ISSUE DATE: 06/23/2004
CERTIFICATE BALANCE AT ISSUE: $87,187,121.20
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	700		$83,124,243.88
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$80,700.45
Unscheduled Principal Collection/Reversals		$13,918.15
Liquidations-in-full	6	$904,076.11
Subsequent Recoveries		$0.00
Net principal Distributed		$998,694.71	-$998,694.71

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	694		$82,125,549.17

SCHEDULED INTEREST AT MORTGAGE RATE:		$440,556.97

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Interest Uncollected on Prepayment		$0.00
Uncompensated Uncollected Interest		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$17,317.67

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$1,421,934.01

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
SERIES: WAMU 04CB2
WEIGHTED AVERAGE PC RATE: 6.56743%
WEIGHTED AVERAGE MATURITY: 352.83341
WEIGHTED AVERAGE LOAN AGE: 6.12526
POOL NUMBER: 2432
ISSUE DATE: 06/23/2004
CERTIFICATE BALANCE AT ISSUE: $34,828,143.48
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	299		$33,246,471.11
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$29,381.89
Unscheduled Principal Collection/Reversals		$6,457.28
Liquidations-in-full	6	$828,676.20
Subsequent Recoveries		$0.00
Net principal Distributed		$864,515.37	-$864,515.37

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	293		$32,381,955.74

SCHEDULED INTEREST AT MORTGAGE RATE:		$188,879.71

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Interest Uncollected on Prepayment		$0.00
Uncompensated Uncollected Interest		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$6,926.43

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$1,046,468.65

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
SERIES: WAMU 04CB2
WEIGHTED AVERAGE PC RATE: 5.21169%
WEIGHTED AVERAGE MATURITY: 172.89093
WEIGHTED AVERAGE LOAN AGE: 6.58657
POOL NUMBER: 2433
ISSUE DATE: 06/23/2004
CERTIFICATE BALANCE AT ISSUE: $37,698,815.15
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	391		$36,478,341.16
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$138,023.03
Unscheduled Principal Collection/Reversals		$9,079.38
Liquidations-in-full	1	$250,512.22
Subsequent Recoveries		$0.00
Net principal Distributed		$397,614.63	-$397,614.63

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	390		$36,080,726.53

SCHEDULED INTEREST AT MORTGAGE RATE:		$166,027.79

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Interest Uncollected on Prepayment		$0.00
Uncompensated Uncollected Interest		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$7,599.65

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$556,042.77

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
SERIES: WAMU 04CB2
WEIGHTED AVERAGE PC RATE: 4.67518%
WEIGHTED AVERAGE MATURITY: 172.29655
WEIGHTED AVERAGE LOAN AGE: 6.81252
POOL NUMBER: 2434
ISSUE DATE: 06/23/2004
CERTIFICATE BALANCE AT ISSUE: $14,836,152.47
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	112		$14,253,637.81
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$56,574.91
Unscheduled Principal Collection/Reversals		$5,902.47
Liquidations-in-full	1	$163,392.43
Subsequent Recoveries		$0.00
Net principal Distributed		$225,869.81	-$225,869.81

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	111		$14,027,768.00

SCHEDULED INTEREST AT MORTGAGE RATE:		$58,501.43

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Interest Uncollected on Prepayment		$0.00
Uncompensated Uncollected Interest		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$2,969.53

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$281,401.71

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
SERIES: WAMU 04CB2
WEIGHTED AVERAGE PC RATE: 5.68091%
WEIGHTED AVERAGE MATURITY: 172.63758
WEIGHTED AVERAGE LOAN AGE: 6.46571
POOL NUMBER: 2435
ISSUE DATE: 06/23/2004
CERTIFICATE BALANCE AT ISSUE: $36,090,667.42
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	388		$34,408,753.55
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$126,420.20
Unscheduled Principal Collection/Reversals		$10,148.44
Liquidations-in-full	5	$370,217.65
Subsequent Recoveries		$0.00
Net principal Distributed		$506,786.29	-$506,786.29

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	383		$33,901,967.26

SCHEDULED INTEREST AT MORTGAGE RATE:		$170,062.72

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Interest Uncollected on Prepayment		$0.00
Uncompensated Uncollected Interest		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$7,168.48

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$669,680.53

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
SERIES: WAMU 04CB2
WEIGHTED AVERAGE PC RATE: 5.74519%
WEIGHTED AVERAGE MATURITY: 303.08856
WEIGHTED AVERAGE LOAN AGE: 6.67155
POOL NUMBER: Group 1
ISSUE DATE: 06/23/2004
CERTIFICATE BALANCE AT ISSUE: $326,529,343.93
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	2648		$312,994,668.40
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$551,650.08
Unscheduled Principal Collection/Reversals		$60,495.79
Liquidations-in-full	27	$3,725,046.78
Subsequent Recoveries		$0.00
Net principal Distributed		$4,337,192.65	-$4,337,192.65

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	2621		$308,657,475.75

SCHEDULED INTEREST AT MORTGAGE RATE:		$1,563,719.26

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Interest Uncollected on Prepayment		$0.00
Uncompensated Uncollected Interest		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$65,207.33

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$5,835,704.58

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
SERIES: WAMU 04CB2
WEIGHTED AVERAGE PC RATE: 5.74519%
WEIGHTED AVERAGE MATURITY: 303.08856
WEIGHTED AVERAGE LOAN AGE: 6.67155
POOL NUMBER: ALL
ISSUE DATE: 06/23/2004
CERTIFICATE BALANCE AT ISSUE: $326,529,343.93
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
BALANCES FROM LAST FISCAL MONTH-END:	2648		$312,994,668.40
PRINCIPAL POOL COLLECTION(S):
Scheduled Principal Collection Due Current Month		$551,650.08
Unscheduled Principal Collection/Reversals		$60,495.79
Liquidations-in-full	27	$3,725,046.78
Subsequent Recoveries		$0.00
Net principal Distributed		$4,337,192.65	-$4,337,192.65

CAPITAL LOSS (PRINCIPAL WRITTEN OFF):			$0.00

BALANCE CURRENT FISCAL MONTH-END:	2621		$308,657,475.75

SCHEDULED INTEREST AT MORTGAGE RATE:		$1,563,719.26

UNSCHEDULED INTEREST AT MORTGAGE RATE:
Unscheduled Interest Collection/Reversals		$0.00
Interest Uncollected on Liquidation		$0.00
Interest Uncollected on Non-Earning Assets		$0.00
Interest Uncollected on Prepayment		$0.00
Uncompensated Uncollected Interest		$0.00
Net Unscheduled Interest Distributed		$0.00

OTHER:
Loan Conversion Fees		$0.00
Expense Reimbursements		$0.00
Gain on Liquidations		$0.00
Hazard Insurance Premium Refunds		$0.00
Recoveries Carried Forward		$0.00
Net Other Distributions		$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
MASTER SERVICING
MORTGAGE PASS-THROUGH CERTIFICATES
12/2004 DISTRIBUTION REPORT
	TOTAL NUMBER OF MORTAGES	CERTIFICATE ACCOUNT ACTIVITY (@ PCRATE)	CERTIFICATE BALANCE OUTSTANDING
SCHEDULED SERVICING FEE EXPENSES:		$65,207.33

UNSCHEDULED SERVICING FEES:
Unscheduled Service Fee Collections/Reversals		$0.00
Servicing Fees Uncollected on Liquidation		$0.00
Servicing Fees Uncollected/Non-Earning Assets		$0.00
Net Unscheduled Service Fees Distributed		$0.00

MISCELLANEOUS EXPENSES:		$0.00

NET FUNDS DISTRIBUTED:		$5,835,704.58

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.04CB2
Distribution Date: 12/27/2004

Distribution by Group
Pool ID		Principal		Interest		Total
Pool - 2429		$34,383.40		$123,558.67		$157,942.07
Pool - 2430		$1,309,328.44		$392,906.40		$1,702,234.84
Pool - 2431		$998,694.71		$423,239.30		$1,421,934.01
Pool - 2432		$864,515.37		$181,953.28		$1,046,468.65
Pool - 2433		$397,614.63		$158,428.14		$556,042.77
Pool - 2434		$225,869.81		$55,531.90		$281,401.71
Pool - 2435		$506,786.29		$162,894.24		$669,680.53
Group 1		$4,337,192.65		$1,498,511.93		$5,835,704.58
Aggregate		$4,337,192.65		$1,498,511.93		$5,835,704.58

Number of Loans and Aggregate Principal Balance By Group
Pool ID	Beg Bal	Beg Count	Paid Off / Liq Count	Rem Count	Sched Prin End Bal	Sched Prin	Prin PrePay / Liq	Unsched Prin / Rev	Total Prin
Pool - 2429	$28,231,401.49	177	0	177	$28,197,018.09	$32,093.93	$0.00	$2,289.47	$34,383.40
Pool - 2430	$83,251,819.40	581	8	573	$81,942,490.96	$88,455.67	$1,208,172.17	$12,700.60	$1,309,328.44
Pool - 2431	$83,124,243.88	700	6	694	$82,125,549.17	$80,700.45	$904,076.11	$13,918.15	$998,694.71
Pool - 2432	$33,246,471.11	299	6	293	$32,381,955.74	$29,381.89	$828,676.20	$6,457.28	$864,515.37
Pool - 2433	$36,478,341.16	391	1	390	$36,080,726.53	$138,023.03	$250,512.22	$9,079.38	$397,614.63
Pool - 2434	$14,253,637.81	112	1	111	$14,027,768.00	$56,574.91	$163,392.43	$5,902.47	$225,869.81
Pool - 2435	$34,408,753.55	388	5	383	$33,901,967.26	$126,420.20	$370,217.65	$10,148.44	$506,786.29
Group 1	$312,994,668.40	2648	27	2621	$308,657,475.75	$551,650.08	$3,725,046.78	$60,495.79	$4,337,192.65
Aggregate	$312,994,668.40	2648	27	2621	$308,657,475.75	$551,650.08	$3,725,046.78	$60,495.79	$4,337,192.65

Delinquency Information by Group
Pool ID	1 Month Count	Sched End Balance	2 Months Count	Sched End Balance	3 Months Count	Sched End Balance	4 Months Count	Sched End Balance
Pool - 2429	0	$0.00	0	$0.00	0	$0.00	0	$0.00
Pool - 2430	7	$1,106,318.35	0	$0.00	0	$0.00	0	$0.00
Pool - 2431	5	$523,749.62	0	$0.00	0	$0.00	1	$77,251.87
Pool - 2432	2	$113,961.27	0	$0.00	0	$0.00	0	$0.00
Pool - 2433	1	$83,102.40	0	$0.00	0	$0.00	0	$0.00
Pool - 2434	0	$0.00	0	$0.00	0	$0.00	0	$0.00
Pool - 2435	1	$85,303.65	1	$95,806.28	0	$0.00	0	$0.00
Group 1	16	$1,912,435.29	1	$95,806.28	0	$0.00	1	$77,251.87
Aggregate	16	$1,912,435.29	1	$95,806.28	0	$0.00	1	$77,251.87

Foreclosure and REO Information by Group
Pool ID		Foreclosure Count		Sched End Balance		REO Count		Sched End Balance
Pool - 2429		0		$0.00		0		$0.00
Pool - 2430		0		$0.00		0		$0.00
Pool - 2431		0		$0.00		0		$0.00
Pool - 2432		1		$29,049.67		0		$0.00
Pool - 2433		0		$0.00		0		$0.00
Pool - 2434		0		$0.00		0		$0.00
Pool - 2435		0		$0.00		0		$0.00
Group 1		1		$29,049.67		0		$0.00
Aggregate		1		$29,049.67		0		$0.00

Aggregate Loss Amounts by Group
Pool ID			Count			Loss Amount
Pool - 2429			0			$0.00
Pool - 2430			0			$0.00
Pool - 2431			0			$0.00
Pool - 2432			0			$0.00
Pool - 2433			0			$0.00
Pool - 2434			0			$0.00
Pool - 2435			0			$0.00
Group 1			0			$0.00
Aggregate			0			$0.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.04CB2
Distribution Date: 12/27/2004

INSURANCE RESERVES - Group 1
Insurance Type	Original Balance	Claims In Progress	Claims Paid	Coverage Adjustments	Coverage Remaining
MPI	$0.00	$0.00	$0.00	$0.00	$0.00
Special Hazard	$3,265,293.00	$0.00	$0.00	$0.00	$3,265,293.00
Bankruptcy Bond
Single-Units	$100,000.00	$0.00	$0.00	$0.00	$100,000.00
Multi-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Mortgage Repurchase	$6,530,586.00	$0.00	$0.00	$0.00	$6,530,586.00

INSURANCE RESERVES - Aggregate
Insurance Type	Original Balance	Claims In Progress	Claims Paid	Coverage Adjustments	Coverage Remaining
MPI	$0.00	$0.00	$0.00	$0.00	$0.00
Special Hazard	$3,265,293.00	$0.00	$0.00	$0.00	$3,265,293.00
Bankruptcy Bond
Single-Units	$100,000.00	$0.00	$0.00	$0.00	$100,000.00
Multi-Units	$0.00	$0.00	$0.00	$0.00	$0.00
Mortgage Repurchase	$6,530,586.00	$0.00	$0.00	$0.00	$6,530,586.00

WASHINGTON MUTUAL MORTGAGE SECURITIES CORP.
Series: WAMU.04CB2
Distribution Date: 12/27/2004

The Group B Certificates provide, to the limited extent described in the Prospectus Supplement, credit support, as well as special hazard, bankruptcy, and fraud coverage to certain Group I, II, III, IV,V,VI,and VII Certificates. The "Prospectus Supplement" is that certain Prospectus Supplement, dated June 21, 2004 to that certain Prospectus Supplement, dated February 10, 2004, to which certain Group I, II, III, IV, V, VI, and VII Certificates were offered. The Special Hazard, Bankruptcy, and Fraud coverage (collectively, "Credit Enhancements") provided by the B certificates provide coverage to the Group I, II, III, IV,V,VI, and VII Loans, subject to the conditions and limitations to payment specified thereunder.



The Class Principal Balances of each Class of the Class B1,B2,B3,B4,B5,B6 Certificatesimmediately after the principal and interest distribution on 200412 are as follows:

Class			Class Principal Balance
B1			$9,210,603.66
B2			$4,201,327.65
B3			$2,585,431.95
B4			$2,585,431.95
B5			$1,939,074.45
B6			$1,292,721.83
Total			$21,814,591.49
Capitalized items used but not defined herein have the meanings ascribed to them in the Prospectus Supplement.
The amount of the special hazard coverage, bankruptcy coverage, and fraud coverage, as of the above referenced distribution date, is $3,265,293.00, $100,000.00, $6,530,586.00 respectively, and such coverages are referred to in the table above under the column "Insurance Type" as "special hazard," "bankruptcy bond," and "mortgage repurchase," respectively. However, no policy of insurance exists for any such coverage, notwithstanding the reference to "insurance."

WaMu Mortgage Pass-Through Certificates, Series 2004-CB2 8-K