The Men's 100 metre butterfly competition at the 2022 World Aquatics Championships was held on 23 and 24 June 2022.

[1][2] Prior to the competition, the existing world and championship records were as follows.

The heats were started on 23 June at 09:00.

[3] The semifinals were started on 23 June at 18:10.

[4] The Final was held on 24 June at 18:44.