| 1 | Dmitry Buryak | RUS | 47,03 | Q | |
| 2 | Michael Mathieu | BAH | 47,10 | Q | |
| 3 | Rabah Yousif | SUD | 47,21 | ||
| 4 | Santiago Ezquerro | ESP | 47,26 | ||
| 5 | Takeshi Fujiwara | ESA | 48,21 | NR | |
| Renny Quow | TRI | DNF |
| 1 | David Gillick | IRL | 46,72 | Q | |
| 2 | William Collazo | CUB | 46,78 | Q | |
| 3 | Ricardo Chambers | JAM | 47,06 | q | |
| 4 | Dale Garland | GBR | 48,26 | ||
| 5 | Wala Gime | PNG | 49,92 | NR |
| 1 | Bershawn Jackson | USA | 46,87 | Q | |
| 2 | Nery Brenes | CRC | 46,94 | Q | |
| 3 | Richard Buck | GBR | 47,02 | q | |
| 4 | Clemens Zeller | AUT | 47,39 | ||
| 5 | Lewis Banda | ZIM | 48,85 | ||
| 6 | Gakologelwang Masheto | BOT | 50,96 |
| 1 | Jamaal Torrance | USA | 46,70 | Q | |
| 2 | Edino Steele | JAM | 46,80 | Q | |
| 3 | Brian Gregan | IRL | 47,26 | ||
| 4 | Nicolas Fillon | FRA | 48,28 | ||
| 5 | Jarrin Solomon | TRI | 48,37 | ||
| 6 | Matthew Pangelinan | GUM | 55,33 |
| 1 | Chris Brown | BAH | 46,95 | Q | |
| 2 | Denis Alekseyev | RUS | 47,18 | Q | |
| 3 | Marcin Marciniszyn | POL | 47,23 | ||
| 4 | Arismendy Peguero | DOM | 47,28 | ||
| 5 | Andrés Silva | URU | 49,09 | ||
| Mohammed Ghaleb Al-Omaisi | YEM | DNS |