| Final 21.05h | time | L | | 1. Felix Sanchez |  DOM | 47.49s | 5 | | 2. Fabrizio Mori |  ITA | 47.54s | 4 | | 3. Dai Tamesue |  JPN | 47.89s | 3 | | 4. Hadi Al-Somaily |  KSA | 47.99s | 1 | | 5. Christopher Rawlinson |  GBR | 48.54s | 6 | | 6. Pawel Januszewski |  POL | 48.57s | 7 | | 7. Jiri Muzik |  CZE | 49.07s | 8 | | -. Boris Gorban |  RUS | DQ | 2 |
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| Heat 1 19.15h | time | L | | 1. Fabrizio Mori | ITA | 48.49s | 4 | | 2. Soua'an Al-SomailyHadi | KSA | 48.64s | 3 | | 3. Ian Weakley |  JAM | 49.04s | 5 | | 4. Angelo Taylor |  USA | 49.23s | 6 | | 5. Ruslan Mashchenko | RUS | 49.32s | 2 | | 6. Anthony Borsumato | GBR | 49.48s | 1 | | 7. Yvon Rakotoarimiandry |  MAD | 49.81s | 7 | | 8. Eduardo Ivan Rodriguez |  ESP | .....s | 8 |
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| Heat 2 19.23h | time | L | | 1. Christopher Rawlinson | GBR | 48.27s | 3 | | 2. Boris Gorban | RUS | 48.50s | 2 | | 3. Jiri Muzik | CZE | 48.53s | 6 | | 4. Calvin Davis | USA | 48.99s | 1 | | 5. Periklis Iakovakis | GRE | 49.38s | 7 | | 6. Neil Gardner | JAM | 49.57s | 4 | | 7. Marek Plawgo | POL | 49.80s | 5 | | 8. Alwyn Myburgh | RSA | 50.34s | 8 |
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| Heat 3 19.31h | time | L | | 1. Felix Sanchez | DOM | 48.07s | 5 | | 2. Dai Tamesue | JPN | 48.10s | 4 | | 3. Pawel Januszewski | POL | 48.40s | 2 | | 4. Mustapha Sdad |  MAR | 49.14s | 3 | | 5. James Carter | USA | 49.38s | 7 | | 6. Mario Watts | JAM | 49.96s | 1 | | 7. Blair Young |  AUS | 50.21s | 8 | | 8. de Nunes |  BRA | 51.23s | 6 |
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| Heat 1 10.45h | time | L | | 1. Fabrizio Mori | ITA | 49.29s | 7 | | 2. Ian Weakley | JAM | 49.40s | 3 | | 3. Boris Gorban | RUS | 49.60s | 4 | | 4. Edivaldo Monteiro |  POR | 50.42s | 6 | | 5. Hideaki Kawamura | JPN | 50.61s | 2 | | 6. Harijan Ratnayake |  SRI | 51.28s | 5 | | -. Du'aine Thorne-Ladejo | GBR | DNS | 8 |
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| Heat 2 10.53h | time | L | | 1. Felix Sanchez | DOM | 48.64s | 4 | | 2. Mustapha Sdad | MAR | 48.96s | 7 | | 3. Pawel Januszewski | POL | 49.33s | 2 | | 4. Eduardo Ivan Rodriguez | ESP | 49.51s | 5 | | 5. Calvin Davis | USA | 49.93s | 3 | | 6. Blair Young | AUS | 50.17s | 6 | | 7. Hani Mourhej |  SYR | 50.69s | 8 |
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| Heat 3 11.01h | time | L | | 1. Dai Tamesue | JPN | 49.45s | 6 | | 2. Eronilde Nunes de Araujo | BRA | 50.16s | 4 | | 3. James Carter | USA | 50.41s | 2 | | 4. Alain Rohr |  SUI | 50.50s | 8 | | 5. Marthinus Kritzinger |  RSA | 51.20s | 7 | | 6. Mowen Boino |  PNG | 51.82s | 3 | | -. Tien-Wen Chen |  TPE | DQ | 5 |
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| Heat 4 11.09h | time | L | | 1. Neil Gardner | JAM | 49.29s | 4 | | 2. Angelo Taylor | USA | 49.39s | 3 | | 3. Ruslan Mashchenko | RUS | 49.50s | 2 | | 4. Anthony Borsumato | GBR | 49.65s | 5 | | 5. Ibou Faye |  SEN | 50.26s | 6 | | 6. Monte Raymond |  CAN | 50.71s | 8 | | -. Gennadiy Gorbenko |  UKR | DNF | 7 |
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| Heat 5 11.17h | time | L | | 1. Christopher Rawlinson | GBR | 49.38s | 3 | | 2. Marek Plawgo | POL | 49.75s | 4 | | 3. Mario Watts | JAM | 49.86s | 2 | | 4. Alwyn Myburgh | RSA | 49.96s | 8 | | 5. Stepan Tesarik | CZE | 50.30s | 5 | | 6. Ken Yoshizawa | JPN | 50.32s | 6 | | 7. Ian Harnden |  ZIM | 51.67s | 7 |
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| Heat 6 11.25h | time | L | | 1. Hadi Al-SomailySoua'an | KSA | 49.42s | 5 | | 2. Jiri Muzik | CZE | 49.65s | 3 | | 3. Periklis Iakovakis |  GRE | 49.86s | 4 | | 4. Yvon Rakotoarimiandry | MAD | 50.08s | 8 | | 5. Llewellyn Herbert | RSA | 50.28s | 7 | | 6. Roberto Cortes |  ESA | 53.61s | 2 | | -. Viktors Lacis |  LAT | DNF | 6 |
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