2010 FINA World Swimming Championships (25 m) – Men's 50 metre butterfly
The Men's 50 Butterfly at the 10th FINA World Swimming Championships was swum 17 - 18 December 2010 in Dubai, United Arab Emirates. On 17 December 119 individuals swam in the Preliminary heats in the morning, with the top-16 finishers advancing to swim again in the Semifinals that evening. The top-8 from the Semifinals then advanced to swim the Final the next evening.
At the start of the event, the existing World and Championship records were:
The following records were established during the competition:
| Date | Round | Name | Nation | Time | WR | CR |
| 17 December 2010 | Semifinals | Steffen Deibler | | 22.57 | | CR |
| 18 December 2010 | Final | Albert Subirats | | 22.40 | | CR |
Results
Heats
Semifinals
Semifinal 1
| Rank | Lane | Name | Time | Notes |
| 1 | 6 | | 22.57 | Q, CR |
| 2 | 5 | | 22.64 | Q |
| 3 | 3 | | 22.88 | Q |
| 3 | 1 | | 22.88 | Q |
| 5 | 7 | | 22.98 | |
| 6 | 8 | | 22.99 | |
| 6 | 4 | | 22.99 | |
| 8 | 2 | | 23.08 | |
Semifinal 2
| Rank | Lane | Name | Time | Notes |
| 1 | 4 | | 22.68 | Q |
| 2 | 2 | | 22.87 | Q |
| 3 | 5 | | 22.93 | Q |
| 4 | 3 | | 22.93 | Q |
| 5 | 6 | | 22.97 | |
| 6 | 7 | | 23.08 | |
| 7 | 1 | | 23.21 | |
| 8 | 8 | | 23.30 | |
Final
