Athletics at the 1998 Asian Games – Men's 400 metres

The men's 400 metres competition at the 1998 Asian Games in Bangkok, Thailand was held on 13–14 December at the Thammasat Stadium.

Schedule
All times are Indochina Time (UTC+07:00)

Results

 * Legend
 * DSQ — Disqualified

Heats

 * Qualification: First 3 in each heat (Q) and the next 4 fastest (q) advance to the semifinals.

Semifinals

 * Qualification: First 3 in each heat (Q) and the next 2 fastest (q) advance to the final.