UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 13F

                               FORM 13F COVER PAGE

Report for the Calendar Year or Quarter Ended: December 31, 2004

Check here if Amendment [  ]; Amendment Number: ________
   This Amendment (Check only one.): [  ]  is a restatement
                                     [  ]  adds new holdings entries.

Institutional Investment Manager Filing this Report:
Name:           Cincinnati Casualty Company
Address:        6200 South Gilmore Road
                Fairfield, Ohio 45014

13F File Number: 028-10755

The institutional investment manager filing this report and the person by whom
it is signed hereby represent that the person signing the report is authorized
to submit it, that all information contained herein is true, correct and
complete, and that it is understood that all required items, statements,
schedules, lists, and tables, are considered integral parts of this form.

Person Signing the Report on Behalf of Reporting Manager:

Name:   Kenneth S. Miller
Title:  Sr. Vice President
Phone:  (513) 870-2633

Signature, Place and Date of Signing:


      /s/ Kenneth S. Miller       Fairfield, Ohio           February 14, 2005
      ---------------------    ----------------------    -----------------------


Report Type (Check only one.):

[X] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager
    are reported in this report.)

[ ] 13F NOTICE. (Check here if no holdings reported are in this report, and all
    holdings are reported by other reporting manager(s).)

[ ] 13F COMBINATION REPORT. (Check here if a portion of the holdings for this
    reporting manager are reported in this report and a portion are reported by
    other reporting manager(s).)

List of other Managers Reporting for this Manager:  N/A




                              FORM 13F SUMMARY PAGE

                                             
Report Summary:

Number of Other Included Managers                    1
                                                 --------

Form 13F Information Table Entry Total:             11
                                                 --------

Form 13F Information Table Value Total:           158,341
                                                 ----------

List of Other Included Managers:
01 Cincinnati Financial Corporation 13F File No.____________
COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 SH/PRN PUT/CALL TITLE OF CLASS CUSIP FMV (000) SHARES ALLTEL CORP Common 020039103 8,078 137,470 SH CINERGY CORP Common 172474108 5,308 127,500 SH EXXON MOBIL CORPORATION Common 30231G102 26,655 520,000 SH FIFTH THIRD BANCORP Common 316773100 67,165 1,419,979 SH GENERAL ELECTRIC CO. Common 369604103 913 25,000 SH GENUINE PARTS CO Common 372460105 661 15,000 SH JOHNSON & JOHNSON Common 478160104 1,586 25,000 SH NATIONAL CITY CORPORATION Common 635405103 10,312 274,612 SH PROCTER & GAMBLE CORPORATION Common 742718109 13,770 250,000 SH WELLS FARGO & CO Common 949746101 13,673 220,000 SH WYETH Common 983024100 10,222 240,000 SH 158,341 3,254,561
COLUNM 6 COLUNM 7 COLUNM 8 ISSUER INVESTMENT DIS OTH MGRS SOLE SHARED NONE ALLTEL CORP Shared 01 - 137,470 - CINERGY CORP Shared 01 - 127,500 - EXXON MOBIL CORPORATION Shared 01 - 520,000 - FIFTH THIRD BANCORP Shared 01 - 1,419,979 - GENERAL ELECTRIC CO. Shared 01 - 25,000 - GENUINE PARTS CO Shared 01 - 15,000 - JOHNSON & JOHNSON Shared 01 - 25,000 - NATIONAL CITY CORPORATION Shared 01 - 274,612 - PROCTER & GAMBLE CORPORATION Shared 01 - 250,000 - WELLS FARGO & CO Shared 01 - 220,000 - WYETH Shared 01 - 240,000 - 3,254,561
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