| Event: | Men's 400 metres hurdles |
| Win Label: | Winning time |
The men's 400 metres hurdles event at the 2007 Pan American Games was held on July 25–27.
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
| Adam Kunkel | Bayano Kamani | LaRon Bennett |
Qualification: First 2 of each heat (Q) and the next 2 fastest (q) qualified for the final.
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 2 | 49.09 | Q | |||
| 2 | 3 | 49.27 | Q | |||
| 3 | 3 | 49.37 | Q, SB | |||
| 4 | 1 | 49.42 | Q | |||
| 5 | 3 | 49.46 | q | |||
| 6 | 1 | 49.53 | Q | |||
| 7 | 2 | 49.78 | Q, SB | |||
| 8 | 2 | 49.83 | q | |||
| 9 | 2 | 49.84 | ||||
| 10 | 2 | 49.90 | SB | |||
| 11 | 1 | 50.04 | ||||
| 12 | 3 | 50.60 | ||||
| 13 | 1 | 51.20 | PB | |||
| 14 | 1 | 51.31 | PB | |||
| 15 | 1 | 51.51 | ||||
| 16 | 3 | 51.53 | ||||
| 17 | 2 | 51.58 | ||||
| 18 | 3 | 53.05 | ||||
| 19 | 1 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 5 | 48.24 | NR | ||||
| 7 | 48.70 | SB | ||||
| 4 | 49.07 | |||||
| 4 | 3 | 49.28 | ||||
| 5 | 6 | 49.30 | SB | |||
| 6 | 8 | 49.46 | ||||
| 7 | 1 | 49.63 | ||||
| 8 | 2 | 51.76 |