# Athletics at the 2007 Pan American Games – Men's 400 metres

The men's 400 metres event at the 2007 Pan American Games was held on July 23–25.

## Medalists

| Gold | Silver | Bronze |
| Chris Brown Bahamas | Tyler Christopher Canada | Chris Lloyd Dominica |

## Results
### Heats

Qualification: First 3 of each heat (Q) and the next 4 fastest (q) qualified for the semifinals.
| Rank | Heat | Name | Nationality | Time | Notes |
| 1 | 1 | Chris Brown | Bahamas | 45.12 | Q |
| 2 | 4 | Avard Moncur | Bahamas | 45.27 | Q |
| 3 | 1 | Lionel Larry | United States | 45.32 | Q |
| 4 | 1 | Arismendy Peguero | Dominican Republic | 45.34 | Q, PB |
| 5 | 4 | Renny Quow | Trinidad and Tobago | 45.35 | Q, PB |
| 6 | 1 | William Collazo | Cuba | 45.63 | q, PB |
| 7 | 2 | Jamaal Torrance | United States | 45.65 | Q |
| 8 | 2 | Chris Lloyd | Dominica | 45.83 | Q |
| 9 | 4 | Leford Green | Jamaica | 45.89 | Q |
| 10 | 3 | Tyler Christopher | Canada | 45.99 | Q |
| 11 | 3 | Alleyne Francique | Grenada | 46.05 | Q |
| 12 | 3 | Ato Modibo | Trinidad and Tobago | 46.25 | Q |
| 13 | 3 | Carlos Santa | Dominican Republic | 46.34 | q |
| 13 | 4 | Félix Martínez | Puerto Rico | 46.34 | q |
| 15 | 2 | Omar Cisneros | Cuba | 46.51 | Q |
| 16 | 4 | Nathan Vadeboncoeur | Canada | 46.76 | q |
| 17 | 1 | Sanderlei Parrela | Brazil | 46.85 | |
| 18 | 2 | Edino Steele | Jamaica | 47.12 | |
| 19 | 2 | Anghelo Edmund | Panama | 47.41 | |
| 20 | 3 | Andrés Silva | Uruguay | 47.73 | |
| 21 | 2 | Rodrigo Bargas | Brazil | 47.88 | |
| 22 | 1 | Melville Rogers | Saint Kitts and Nevis | 48.02 | |
| 23 | 2 | Camilo Quevedo | Guatemala | 49.19 | |
| 24 | 4 | David Pierre | Haiti | 49.26 | |
| 25 | 3 | Charmant Ollivierre | Saint Vincent and the Grenadines | 50.13 | |
| | 1 | David Hamil | Cayman Islands | DNS | |

### Semifinals

Qualification: First 4 of each semifinal (Q) qualified directly for the final.
| Rank | Heat | Name | Nationality | Time | Notes |
| 1 | 2 | Tyler Christopher | Canada | 45.28 | Q |
| 2 | 2 | Lionel Larry | United States | 45.40 | Q |
| 3 | 2 | Avard Moncur | Bahamas | 45.44 | Q |
| 4 | 1 | Chris Brown | Bahamas | 45.51 | Q |
| 5 | 2 | Alleyne Francique | Grenada | 45.57 | Q |
| 6 | 1 | Chris Lloyd | Dominica | 45.63 | Q |
| 7 | 2 | Renny Quow | Trinidad and Tobago | 45.74 | |
| 8 | 1 | William Collazo | Cuba | 45.75 | Q |
| 8 | 1 | Jamaal Torrance | United States | 45.75 | Q |
| 10 | 1 | Arismendy Peguero | Dominican Republic | 45.75 | |
| 11 | 1 | Ato Modibo | Trinidad and Tobago | 46.42 | |
| 12 | 2 | Félix Martínez | Puerto Rico | 46.60 | |
| 13 | 2 | Omar Cisneros | Cuba | 46.62 | |
| 14 | 1 | Leford Green | Jamaica | 46.80 | |
| 15 | 1 | Nathan Vadeboncoeur | Canada | 47.39 | |
| 16 | 2 | Carlos Santa | Dominican Republic | 47.45 | |

### Final

| Rank | Lane | Name | Nationality | Time | Notes |
| | 5 | Chris Brown | Bahamas | 44.85 | SB |
| | 4 | Tyler Christopher | Canada | 45.05 | |
| | 6 | Chris Lloyd | Dominica | 45.40 | |
| 4 | 7 | William Collazo | Cuba | 45.45 | PB |
| 5 | 8 | Alleyne Francique | Grenada | 45.49 | SB |
| 6 | 2 | Avard Moncur | Bahamas | 45.51 | |
| 7 | 1 | Jamaal Torrance | United States | 46.05 | |
| | 3 | Lionel Larry | United States | DNF | |