Swimming at the 2001 World Aquatics Championships – Men's 50 metre breaststroke

The men's 50 metre breaststroke event at the 2001 World Aquatics Championships took place 29 July. The heats and semifinals took place 28 July, with the final being held on 29 July.

Records
Prior to the competition, the existing world and championship records were as follows: The following record was established during the competition: