1987 World Championships in Athletics – Men's 400 metres

These are the official results of the Men's 400 metres event at the 1987 IAAF World Championships in Rome, Italy. There were a total number of 48 participating athletes, with six qualifying heats and the final held on Thursday 3rd September 1987. The winning margin was 0.23 seconds.

Records
Existing records at the start of the event.

Semifinals

 * Held on Sunday 1987-09-01

Quarterfinals

 * Held on Saturday 1987-08-31

Qualifying heats

 * Held on Saturday 1987-08-30