| 2004–05 Serbia and Montenegro Cup | |
| Num Teams: | 32 |
| Champions: | Železnik |
| Runner-Up: | Red Star |
| Matches: | 31 |
| Goals: | 68 |
| Prevseason: | 2003–04 |
| Nextseason: | 2005–06 |
The 2004–05 Serbia and Montenegro Cup was the third season of the Serbia and Montenegro's annual football cup. The cup defenders was Red Star Belgrade, but was defeated by FK Železnik in the final.
Thirty-two teams entered in the First Round. The matches were played on 20, 22, 29 September, 6 and 20 October 2004.
|}Note: Roman numerals in brackets denote the league tier the clubs participated in the 2004–05 season.
The 16 winners from the prior round enter this round. The matches were played on 26 and 27 October 2004.
|}Note: Roman numerals in brackets denote the league tier the clubs participated in the 2004–05 season.
The eight winners from the prior round enter this round. The matches were played on 10 November 2004.
|}Note: Roman numerals in brackets denote the league tier the clubs participated in the 2004–05 season.
Note: Roman numerals in brackets denote the league tier the clubs participated in the 2004–05 season.