| Swimming at the 2013 SEA Games | ||
|---|---|---|
| | ||
| Freestyle | ||
| 50 m | men | women |
| 100 m | men | women |
| 200 m | men | women |
| 400 m | men | women |
| 800 m | women | |
| 1500 m | men | |
| Backstroke | ||
| 100 m | men | women |
| 200 m | men | women |
| Breaststroke | ||
| 100 m | men | women |
| 200 m | men | women |
| Butterfly | ||
| 100 m | men | women |
| 200 m | men | women |
| Individual medley | ||
| 200 m | men | women |
| 400 m | men | women |
| Freestyle relay | ||
| 4×100 m | men | women |
| 4×200 m | men | women |
| Medley relay | ||
| 4×100 m | men | women |
The Men's 100 metre butterfly event at the 2013 SEA Games took place on 14 December 2013 at Wunna Theikdi Aquatics Centre.
There were 15 competitors from 8 countries who took part in this event. Two heats were held. The heat in which a swimmer competed did not formally matter for advancement, as the swimmers with the top eight times from both field qualified for the finals.
All times are Myanmar Standard Time (UTC+06:30)
| Date | Time | Event |
|---|---|---|
| Saturday, 14 December 2013 | 09:20 | Heats |
| 18:43 | Final |
Prior to this competition, the existing world, Asian, and Southeast Asian Games records were as follows.
| World Record | 49.82 | Rome, Italy | 1 August 2009 | |
| Asian Record | 51.00 | Niigata, JPN | 11 September 2009 | |
| Games Record | 53.07 | Palembang, Indonesia | 13 November 2011 |
| Rank | Heat | Lane | Athlete | Time | Notes |
|---|---|---|---|---|---|
| 1 | 2 | 4 | 55.03 | Q | |
| 2 | 1 | 3 | 56.09 | Q | |
| 3 | 2 | 3 | 56.43 | Q | |
| 4 | 1 | 4 | 56.69 | Q | |
| 5 | 2 | 2 | 56.81 | Q | |
| 6 | 2 | 5 | 56.90 | Q | |
| 7 | 2 | 6 | 56.91 | Q | |
| 8 | 1 | 5 | 57.09 | Q | |
| 9 | 1 | 6 | 57.61 | ||
| 10 | 1 | 2 | 1:01.42 | ||
| 11 | 1 | 7 | 1:05.28 | ||
| 12 | 2 | 7 | 1:05.82 | ||
| 13 | 2 | 1 | 1:09.88 | ||
| 14 | 2 | 8 | 1:10.43 | ||
| 15 | 1 | 1 | 1:10.50 |
| Rank | Lane | Athlete | Time | Notes |
|---|---|---|---|---|
| 4 | 52.67 | GR | ||
| 8 | 53.14 | |||
| 7 | 53.93 | |||
| 4 | 6 | 54.63 | ||
| 5 | 5 | 55.08 | ||
| 6 | 3 | 55.99 | ||
| 7 | 2 | 56.18 | ||
| 8 | 1 | 56.24 |