Track and field at the 2011 Military World Games – Men's 400 metres
# Track and field at the 2011 Military World Games – Men's 400 metres

The men's 400 metres event at the 2011 Military World Games was held on 20 and 21 July at the Estádio Olímpico João Havelange.

## Records

Prior to this competition, the existing world and CISM record were as follows:

| World Record | Michael Johnson (USA) | 43.18 | Sevilla, Spain | 26 August 1999 |
| - | - | - | - | - |
| CISM World Record | David Kirui (KEN) | 45.30 | Tivoli, Italy | 6 September 2002 |

## Schedule

| Date | Time | Round |
| - | - | - |
| 20 July 2011 | 11:55 | Round 1 |
| 21 July 2011 | | Semifinals |
| 21 July 2011 | 18:00 | Final |

## Medalists

| Gold | Silver | Bronze |
| - | - | - |
| Sajjad Hashemi Iran | Mark Mutai Kenya | Arismendy Peguero Dominican Republic |

## Results

### Final

| Rank | Lane | Name | Nationality | Time | Notes |
| - | - | - | - | - | - |
| | 8 | Sajjad Hashemi | Iran | 45.81 | NR |
| | 4 | Mark Mutai | Kenya | 45.91 | |
| | 6 | Arismendy Peguero | Dominican Republic | 45.95 | |
| 4 | 5 | Kacper Kozłowski | Poland | 46.02 | |
| 5 | 1 | Miguel Barton | Jamaica | 46.45 | |
| 6 | 7 | Marouane El-Maadadi | Morocco | 46.54 | |
| 7 | 2 | Piotr Klimczak | Poland | 47.16 | |
| | 3 | Yousef Masrahi | Saudi Arabia | DNF | |
