| Event: | Men's 50 metre butterfly S5 |
| Games: | 2012 Summer |
| Venue: | London Aquatics Centre |
| Dates: | 7 September |
| Competitors: | 21 |
| Nations: | 17 |
| Gold: | Daniel Dias |
| Goldnpc: | BRA |
| Silver: | Roy Perkins |
| Silvernpc: | USA |
| Bronze: | Junquan He |
| Bronzenpc: | CHN |
The men's 50 metre butterfly S5 event at the 2012 Paralympic Games took place on 7 September, at the London Aquatics Centre.
Three heats were held, each with seven swimmers. The swimmers with the eight fastest times advanced to the final.
| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 4 | Junquan He | 37.26 | Q | |
| 2 | 2 | Darko Đurić | 40.99 | Q, WR | |
| 3 | 3 | Ricardo Ten | 43.29 | Q | |
| 4 | 5 | Voravit Kaewkham | 45.04 | ||
| 5 | 7 | Aleksei Lyzhikhin | 51.30 | ||
| 6 | 1 | Ariel Quassi | 55.19 | ||
| 6 | Anthony Stephens | DNS | |||
| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 4 | Roy Perkins | 34.53 | Q, PR | |
| 2 | 5 | Andrew Mullen | 39.71 | Q | |
| 3 | 3 | Arnost Petracek | 42.08 | Q | |
| 4 | 6 | Antonios Tsapatakis | 44.47 | ||
| 5 | 2 | Clodoaldo Silva | 47.19 | ||
| 6 | 7 | Nicolo Bensi | 49.06 | ||
| 7 | 1 | Matija Grebenic | 52.12 | ||
| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 4 | Daniel Dias | 35.72 | Q | |
| 2 | 3 | Beytullah Eroglu | 42.27 | Q | |
| 3 | 6 | Efrem Morelli | 43.71 | ||
| 4 | 5 | Thanh Tung Vo | 43.82 | ||
| 5 | 7 | Takayuki Suzuki | 48.10 | ||
| 6 | 2 | Jamery Siga | 51.54 | ||
| 7 | 1 | Miguel Luque | 54.88 | ||
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 5 | Daniel Dias | 34.15 | WR | |||
| 4 | Roy Perkins | 34.57 | ||||
| 3 | Junquan He | 37.20 | ||||
| 4 | 6 | Andrew Mullen | 40.04 | |||
| 5 | 2 | Darko Duric | 40.48 | WR | ||
| 6 | 7 | Arnost Petracek | 41.23 | |||
| 7 | 1 | Beytullah Eroglu | 41.44 | |||
| 8 | 8 | Ricardo Ten | 43.65 |