| 1 | Harry Reynolds | USA | 45,70 | Q |
| 2 | Rico Lieder | GER | 46,16 | Q |
| 3 | Darren Clark | AUS | 46,64 | q |
| 4 | Devon Morris | JAM | 46,83 | q |
| 5 | Cephas Lemba | ZAM | 47,16 | |
| 6 | Masayoshi Kan | JPN | 47,25 |
| 1 | Sunday Bada | NGR | 46,29 | Q |
| 2 | Jason Rouser | USA | 46,80 | Q |
| 3 | Mark Jackson | CAN | 47,10 | |
| 4 | Cayetano Cornet | ESP | 47,12 | |
| Benyounes Lahlou | MAR | DQ | ||
| Ibrahim Ismail | QAT | DQ |