Swimming at the 2020 European Aquatics Championships – Men's 400 metre individual medley

The Men's 400 metre individual medley competition of the 2020 European Aquatics Championships was held on 23 May 2021.

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

Heats
The heats were started at 10:00.

Final
The final was held at 18:42.