The Men's 100 metre breaststroke competition of the 2024 European Aquatics Championships was held on 17 and 18 June 2024.

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

The heats were started on 17 June at 10:19.Qualification Rules: The 16 fastest from the heats qualify to the semifinals.

[3] The semifinal were started on 17 June at 19:05.Qualification Rules: The first 2 competitors of each semifinal and the remaining fastest (up to a total of 8 qualified competitors) from the semifinals advance to the final.

[4] The final was held on 18 June at 18:48.