| 1 | Demetrius Pinder | BAH | 46,49 | Q | |
| 2 | Tabarie Henry | ISV | 46,71 | Q | |
| 3 | Mark Ujakpor | ESP | 47,06 | q | |
| 4 | Wala Gime | PNG | 48,85 | ||
| 5 | Yaovi Michael Gougou | BEN | 51,20 | NR |
| 1 | Kirani James | GRN | 46,64 | Q | |
| 2 | Nery Brenes | CRC | 46,77 | Q | |
| 3 | Luguelín Santos | DOM | 47,07 | q | |
| 4 | Rabah Yousif | SUD | 47,30 | q | |
| 5 | Maksim Aleksandrenko | RUS | 47,78 | q |
| 1 | Nigel Levine | GBR | 47,56 | Q | |
| 2 | Lorenzo Valentini | ITA | 48,58 | Q | |
| 3 | Jannot Bacar | COM | 49,58 | ||
| 4 | Andrés Silva | URU | 51,93 | ||
| Lalonde Gordon | TRI | DQ |
| 1 | Gil Roberts | USA | 47,57 | Q | |
| 2 | Valentin Kruglyakov | RUS | 47,70 | Q | |
| 3 | Jarrin Solomon | TRI | 47,82 | ||
| 4 | Takeshi Fujiwara | ESA | 48,96 | ||
| 5 | Kristijan Efremov | MKD | 50,23 |
| 1 | Pavel Maslák | CZE | 47,00 | Q | |
| 2 | Richard Buck | GBR | 47,05 | Q | |
| 3 | Erison Hurtault | DMA | 47,63 | q | |
| 4 | Trausti Stefánsson | ISL | 48,86 | ||
| 5 | Ak. Hafiy Tajuddin Rositi | BRU | 51,02 | NR | |
| 6 | Hussein Al-Fedheili | OMA | 55,15 |
| 1 | Chris Brown | BAH | 47,28 | Q | |
| 2 | Calvin Smith | USA | 47,46 | Q | |
| 3 | Ali Ekber Kayas | TUR | 47,55 | q | |
| 4 | Nika Kartavtsevi | GEO | 48,27 | ||
| 5 | Bahaa Al Farra | PLE | 51,65 | NR | |
| 6 | Jeofry Limtiaco | GUM | 53,67 |