The Men's 50 Breaststroke at the 10th FINA World Swimming Championships (25m) was swum 18 – 19 December in Dubai, United Arab Emirates.

92 individuals swam in the Preliminary heats on 18 December, with the top 16 finishers advancing to the Semifinals that evening.

The top 8 finishers from the Semifinals then advanced to the Final the next evening.

At the start of the event, the existing World (WR) and Championship records (CR) were: The following records were established during the competition: Semifinal 1 Semifinal 2