| 1 | Avard Moncur | BAH | 44,88 | Q |
| 2 | Marcus La Grange | RSA | 45,20 | Q |
| 3 | Robert Mackowiak | POL | 45,27 | Q |
| 4 | Anderson Jorge Oliveira dos Santos | BRA | 45,47 | q |
| 5 | Karel Bláha | CZE | 45,82 | |
| 6 | Tomas Coman | IRL | 45,90 | |
| Yevgeniy Zyukov | UKR | DQ |
| 1 | Alleyne Francique | GRN | 45,66 | Q |
| 2 | Mark Richardson | GBR | 45,66 | Q |
| 3 | Piotr Rysiukiewicz | POL | 45,92 | Q |
| 4 | Ezra Sambu | KEN | 46,18 | |
| 5 | Amin Badany Goma'a | EGY | 46,29 | |
| 6 | Alessandro Attene | ITA | 46,56 | |
| 7 | Kenji Tabata | JPN | 46,68 | |
| 8 | Carlton Fortune | SUR | 52,69 |
| 1 | Hamdan O. Al-Bishi | KSA | 45,00 | Q | |
| 2 | Michael McDonald | JAM | 45,02 | Q | |
| 3 | Sugath Thilakaratne | SRI | 45,41 | Q | |
| 4 | Jerome Young | USA | 45,57 | q | |
| 5 | Ato Modibo | TRI | 45,82 | ||
| 6 | Takahiko Yamamura | JPN | 47,22 | ||
| 7 | Alvaro James | CRC | 47,46 | ||
| 8 | Youba Ould Mohamed | MTN | 47,87 | NR |
| 1 | Antonio Pettigrew | USA | 45,74 | Q |
| 2 | Eric Milazar | MRI | 45,94 | Q |
| 3 | Piotr Dlugosielski | POL | 46,49 | Q |
| 4 | Sanjay Ayre | JAM | 46,96 | |
| 5 | Adriaan Botha | RSA | 47,32 | |
| 6 | Kenmore Hughes | ANT | 48,18 | |
| 7 | Meshaal Saad Al-Harbi | KUW | 48,19 | |
| Arnold Payne | ZIM | DNF |
| 1 | Gregory Haughton | JAM | 45,54 | Q |
| 2 | David Canal | ESP | 45,60 | Q |
| 3 | Iwan Thomas | GBR | 45,92 | Q |
| 4 | Christopher Brown | BAH | 46,01 | |
| 5 | Sunday Bada | NGR | 46,12 | |
| 6 | Flávio de Oliveira Godoy | BRA | 46,13 | |
| 7 | Muhamad Zaiful Zainal Abidin | MAS | 46,46 | |
| 8 | Kerth Gumbs | AIA | 57,83 |
| 1 | Ingo Schultz | GER | 45,11 | Q | |
| 2 | Leonard Byrd | USA | 45,35 | Q | |
| 3 | Shane Niemi | CAN | 45,41 | Q | |
| 4 | Jimisola Laursen | SWE | 45,54 | q | NR |
| 5 | Rohan Pradeep Kumara | SRI | 46,46 | ||
| 6 | Sofiane Labidi | TUN | 47,03 | ||
| 7 | William Hernández | VEN | 47,26 | ||
| 8 | Bheki Malima | SWZ | 49,61 |
| 1 | Malik Louahla | ALG | 45,13 | Q | NR |
| 2 | Hendrick Mokganyetsi | RSA | 45,15 | Q | |
| 3 | Marc Raquil | FRA | 45,55 | Q | |
| 4 | Benjamin Youla | CGO | 45,92 | ||
| 5 | Jamie Baulch | GBR | 46,15 | ||
| 6 | Dmitriy Golovastov | RUS | 46,22 | ||
| 7 | Jun Osakada | JPN | 46,86 | ||
| 8 | Emmanuel De Lorenzi | MON | 55,57 |
| 1 | Avard Moncur | BAH | 44,89 | Q |
| 2 | Antonio Pettigrew | USA | 45,00 | Q |
| 3 | Alleyne Francique | GRN | 45,11 | |
| 4 | Mark Richardson | GBR | 45,14 | |
| 5 | Marc Raquil | FRA | 45,22 | |
| 6 | David Canal | ESP | 45,50 | |
| 7 | Anderson Jorge Oliveira dos Santos | BRA | 45,83 | |
| 8 | Piotr Rysiukiewicz | POL | 46,12 |
| 1 | Gregory Haughton | JAM | 44,83 | Q |
| 2 | Eric Milazar | MRI | 44,92 | Q |
| 3 | Hamdan O. Al-Bishi | KSA | 45,10 | q |
| 4 | Leonard Byrd | USA | 45,39 | |
| 5 | Shane Niemi | CAN | 45,91 | |
| 6 | Hendrick Mokganyetsi | RSA | 45,99 | |
| 7 | Piotr Dlugosielski | POL | 46,62 | |
| 8 | Iwan Thomas | GBR | 46,72 |
| 1 | Ingo Schultz | GER | 44,66 | Q |
| 2 | Robert Mackowiak | POL | 44,84 | Q |
| 3 | Malik Louahla | ALG | 45,14 | |
| 4 | Jerome Young | USA | 45,43 | |
| 5 | Marcus La Grange | RSA | 45,44 | |
| 6 | Jimisola Laursen | SWE | 45,62 | |
| 7 | Sugath Thilakaratne | SRI | 46,69 | |
| Michael McDonald | JAM | DNF |