Swimming at the 2024 World Aquatics Championships – Men's 400 metre freestyle

The men's 400 metre freestyle competition at the 2024 World Aquatics Championships was held on 11 February 2024.

Records
Prior to the competition, the existing world and championship records were as follows.

Heats
The heats were started at 09:44.

Final
The final was started at 19:02.