Swimming at the 2017 SEA Games – Men's 400 metre freestyle

The men's 400 metre freestyle competition of the swimming event at the 2017 SEA Games was held on 21 August at the National Aquatic Centre in Kuala Lumpur, Malaysia.

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

Heats
The heats were held on 21 August.

Heat 1

 * Source: Heat 1 results

Heat 2

 * Source: Heat 2 results

Final

 * Source: Final Results

The final was held on 21 August.