The Men's 100 metre breaststroke event at the 2013 SEA Games took place on 13 December 2013 at Wunna Theikdi Aquatics Centre.
There were 14 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
| width=220 | Date | width=50 | Time | width=100 | Event |
|---|---|---|---|---|---|
| Thursday, 13 December 2013 | 09:08 | Heats | |||
| 18:24 | Final |
| width=40 | Rank | width=40 | Heat | width=40 | Lane | width=250 | Athlete | width=80 | Time | width=50 | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 5 | 1:03.69 | Q | |||||||
| 2 | 2 | 4 | 1:03.83 | Q | |||||||
| 3 | 1 | 4 | 1:04.06 | Q | |||||||
| 4 | 1 | 3 | 1:04.44 | Q | |||||||
| 5 | 1 | 2 | 1:04.67 | Q | |||||||
| 6 | 2 | 2 | 1:04.85 | Q | |||||||
| 7 | 2 | 6 | 1:05.19 | Q | |||||||
| 8 | 2 | 7 | 1:05.36 | Q | |||||||
| 9 | 1 | 5 | 1:05.38 | ||||||||
| 10 | 1 | 6 | 1:05.47 | ||||||||
| 11 | 1 | 7 | 1:11.32 | ||||||||
| 12 | 1 | 2 | 1:11.90 | ||||||||
| 13 | 2 | 1 | 1:13.63 | ||||||||
| - | 2 | 3 | DNS |
| width=40 | Rank | width=40 | Lane | width=250 | Athlete | width=80 | Time | width=50 | Notes |
|---|---|---|---|---|---|---|---|---|---|
| 4 | 1:03.06 | ||||||||
| - | 3 | 1:03.18 | DSQ | ||||||
| 5 | 1:03.32 | ||||||||
| 6 | 1:03.61 | ||||||||
| 5 | 1 | 1:05.16 | |||||||
| 6 | 7 | 1:05.30 | |||||||
| 7 | 2 | 1:05.46 | |||||||
| 8 | 8 | 1:07.01 |
The bronze medallist, Joshua Hall from the Philippines, is expected to have his bronze medal upgraded to a silver medal, after the International Swimming Federation (FINA) slapped a two-year ban on Indonesian swimmer Indra Gunawan, who won the silver medal in the event. Gunawan’s urine sample tested positive for Methylhexaneamine, a performance-enhancing substance, during random testing at the 4th Asian Indoor and Martial Arts Games held in July 2013.[4]