Athletics at the 2015 SEA Games – Men's 400 metres

The men's 400 metres competition of the athletics event at the 2015 SEA Games was held on 12 June at the National Stadium in Singapore.

Records
Prior to this competition, the existing Asian and Games records were as follows: The following records were established during the competition:

Schedule
All times are Singapore Standard Time (UTC+08:00)

Round 1

 * Source: Results Summary


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

Heat 1

 * Source: Results Heat 1

Heat 2

 * Source: Results Heat 2

Final

 * Source: Result Final