Athletics at the 2002 Asian Games – Men's 400 metres

The men's 400 metres competition at the 2002 Asian Games in Busan, South Korea was held on 7–9 October at the Busan Asiad Main Stadium.

Schedule
All times are Korea Standard Time (UTC+09:00)

Results

 * Legend
 * DNF — Did not finish

1st round

 * Qualification: First 4 in each heat (Q) and the next 4 fastest (q) advance to the semifinals.

Semifinals

 * Qualification: First 4 in each heat (Q) advance to the final.