Swimming at the 2015 SEA Games – Men's 400 metre freestyle

The men's 400 metre freestyle competition of the swimming event at the 2015 SEA Games was held on 11 June at the OCBC Aquatic Centre in Kallang, 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)

Heats

 * Source: Heats results summary

The heats were held on 11 June.

Heat 1

 * Source: Heat 1 results

Heat 1 was held on 11 June.

Heat 2

 * Source: Heat 2 results

Heat 2 was held on 11 June.

Final

 * Source: Final Results

The final was held on 11 June.