Swimming at the 2009 Southeast Asian Games – Men's 400 metre individual medley
# Swimming at the 2009 Southeast Asian Games – Men's 400 metre individual medley

The Men's 400 Individual Medley swimming event at the 25th SEA Games was held on December 10, 2009. This even was swum as a timed-final (i.e. swimmers only swam the race once).

## Results

### Final

| Place | Swimmer | Nation | Time |
| - | - | - | - |
| 1 | Miguel Molina | Philippines | 4:27.00 |
| 2 | Nuttapong Ketin | Thailand | 4:27.57 |
| 3 | Thai Nguyen Vo | Vietnam | 4:30.78 |
| 4 | Sheng Jun Pang | Singapore | 4:32.44 |
| 5 | Akbar Nasution | Indonesia | 4:34.24 |
| 6 | Melvin Chua | Malaysia | 4:35.39 |
| 7 | Jose Gonzales | Philippines | 4:39.00 |
| 8 | Wei Ming Ho | Singapore | 4:44.97 |
| 9 | Idham Dasuki | Indonesia | 4:48.29 |
| 10 | Nithipanya A | Thailand | 5:28.92 |
| - | Van Ty Nguyen | Vietnam | DQ |
