| POS | Rank | Heat | ATHLETE | COUNTRY | RESULTS |
|---|---|---|---|---|---|
| 1 | 1 | 1 | Felix Sánchez |
DOM |
47.93 Q |
| 2 | 1 | 2 | Danny McFarlane |
JAM |
48.00 Q PB |
| 3 | 2 | 1 | Marek Plawgo |
POL |
48.16 Q NR |
| 4 | 1 | 3 | James Carter |
USA |
48.18 Q |
| 5 | 2 | 2 | Bennie Brazell |
USA |
48.19 Q |
| 6 | 3 | 1 | Alwyn Myburgh |
RSA |
48.21 q SB |
| 7 | 2 | 3 | Bayano Kamani |
PAN |
48.23 Q NR |
| 8 | 3 | 3 | Naman Keïta |
FRA |
48.24 q |
| 9 | 4 | 3 | Kemel Thompson |
JAM |
48.25 SB |
| 10 | 3 | 2 | Dai Tamesue |
JPN |
48.46 SB |
| 11 | 4 | 2 | PeriklÃs Iakovákis |
GRE |
48.47 SB |
| 12 | 5 | 2 | Llewellyn Herbert |
RSA |
48.57 |
| 13 | 4 | 1 | Angelo Taylor |
USA |
48.72 |
| 14 | 5 | 3 | Jirà MužÃk |
CZE |
48.88 |
| 15 | 5 | 1 | Hadi Soua'an Al-Somaily |
KSA |
48.98 SB |
| 16 | 6 | 3 | Ockert Cilliers |
RSA |
49.01 |
| 17 | 6 | 1 | Mikhail Lipskiy |
RUS |
49.10 |
| 18 | 7 | 1 | Edivaldo Monteiro |
POR |
49.26 |
| 19 | 7 | 3 | Boris Gorban |
RUS |
49.46 |
| 20 | 8 | 3 | Yevgeniy Meleshenko |
KAZ |
49.48 |
| 21 | 8 | 1 | Dean Griffiths |
JAM |
49.51 |
| 22 | 6 | 2 | Eduardo Iván RodrÃguez |
ESP |
49.77 |
| 23 | 7 | 2 | Stepan Tesarik |
CZE |
49.87 |
| 24 | 8 | 2 | Christopher Rawlinson |
GBR |
50.89 |