Swimming at the 2004 Summer Paralympics – Men's 50 metre freestyle S12
The Men's 50 metre freestyle S12 swimming event at the 2004 Summer Paralympics was competed on 26 September. It was won by Dmytro Aleksyeyev, representing.;Heat 1
26 Sept. 2004, morning session
| Rank | Athlete | Time | Notes |
| 1 | | 25.69 | PR |
| 2 | | 25.97 | |
| 3 | | 26.36 | |
| 4 | | 26.68 | |
| 5 | | 26.83 | |
| 6 | | 26.89 | |
;Heat 2
26 Sept. 2004, morning session
| Rank | Athlete | Time | Notes |
| 1 | | 25.58 | PR |
| 2 | | 25.74 | |
| 3 | | 26.28 | |
| 4 | | 26.80 | |
| 5 | | 26.83 | |
| 6 | | 27.49 | |
26 Sept. 2004, evening session
| Rank | Athlete | Time | Notes |
| | 24.80 | WR |
| | 25.27 | |
| | 25.69 | |
| 4 | | 25.88 | |
| 5 | | 26.00 | |
| 6 | | 26.08 | |
| 7 | | 26.60 | |
| 8 | | 26.71 | |
