Swimming at the 2011 World Aquatics Championships – Men's 400 metre individual medley

The men's 400 metre individual medley competition of the swimming events was held on July 31 with the semifinals and the final.

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

Heats
34 swimmers participated in 5 heats.

Final
The final was held at 18:09.