1999 World Championships in Athletics – Men's 400 metres hurdles
These are the official results of the Men's 400 metres Hurdles event at the 1999 IAAF World Championships in Seville, Spain. There were a total number of 50 participating athletes, with seven qualifying heats, two semi-finals and the final held on Friday 1999-08-27 at 21:00h.Final
Semi-Finals
| RANK | HEAT 1 | TIME |
| 1. | | 48.55 |
| 2. | | 48.63 |
| 3. | | 48.80 |
| 4. | | 48.95 |
| 5. | | 49.17 |
| 6. | | 49.28 |
| 7. | | 49.46 |
| 8. | | 50.17 |
| RANK | HEAT 2 | TIME |
| 1. | | 48.18 |
| 2. | | 48.29 |
| 3. | | 48.41 |
| 4. | | 48.53 |
| 5. | | 48.71 |
| 6. | | 49.00 |
| 7. | | 49.45 |
| 8. | | 49.89 |
Qualifying heats
| RANK | HEAT 1 | TIME |
| 1. | | 49.08 |
| 2. | | 49.38 |
| 3. | | 49.53 |
| 4. | | 49.72 |
| 5. | | 49.98 |
| 6. | | 50.14 |
| 7. | | 50.35 |
| | DQ |
| RANK | HEAT 2 | TIME |
| 1. | | 48.90 |
| 2. | | 49.02 |
| 3. | | 49.63 |
| 4. | | 49.67 |
| 5. | | 50.10 |
| 6. | | 50.30 |
| 7. | | 51.70 |
| RANK | HEAT 3 | TIME |
| 1. | | 49.07 |
| 2. | | 49.21 |
| 3. | | 49.40 |
| 4. | | 49.97 |
| 5. | | 50.40 |
| 6. | | 51.48 |
| | DNS |
| RANK | HEAT 4 | TIME |
| 1. | | 48.99 |
| 2. | | 49.82 |
| 3. | | 49.88 |
| 4. | | 49.96 |
| 5. | | 50.77 |
| 6. | | 50.85 |
| | DNS |
| RANK | HEAT 5 | TIME |
| 1. | | 48.55 |
| 2. | | 48.81 |
| 3. | | 48.97 |
| 4. | | 49.66 |
| 5. | | 50.75 |
| 6. | | 52.55 |
| | DNF |
| RANK | HEAT 6 | TIME |
| 1. | | 48.66 |
| 2. | | 49.18 |
| 3. | | 49.48 |
| 4. | | 49.52 |
| 5. | | 49.64 |
| 6. | | 50.05 |
| | DNS |
| RANK | HEAT 7 | TIME |
| 1. | | 49.17 |
| 2. | | 49.52 |
| 3. | | 49.58 |
| 4. | | 50.15 |
| 5. | | 50.34 |
| 6. | | 50.57 |
| 7. | | 53.87 |
