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, 27 August 1999 at 21:00.

Semi-finals

 * Held on Wednesday 1999-08-25

Qualifying heats

 * Held on Tuesday 1999-08-24