| Event: | Men's 50 metre freestyle S4 |
| Games: | 2012 Summer |
| Venue: | London Aquatics Centre |
| Dates: | 31 August |
| Competitors: | 16 |
| Nations: | 13 |
| Gold: | Eskender Mustafaiev |
| Goldnpc: | UKR |
| Silver: | David Smetanine |
| Silvernpc: | FRA |
| Bronze: | Jan Povysil |
| Bronzenpc: | CZE |
The men's 50 metre freestyle S4 event at the 2012 Paralympic Games took place on 31 August, at the London Aquatics Centre.
Two heats were held, one with seven competitors, the other with eight. The swimmers with the eight fastest times advanced to the final.
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 5 | Gustavo Sanchez Martinez | 39.48 | Q | ||
| 2 | 6 | Darko Duric | 39.71 | Q | ||
| 3 | 4 | Richard Oribe | 39.80 | Q | ||
| 4 | 3 | Jan Povysil | 40.65 | Q | ||
| 5 | 2 | Michael Schoenmaker | 43.01 | |||
| 6 | 7 | Aleksei Lyzhikhin | 44.08 | |||
| 7 | 1 | Kestutis Skucas | 52.13 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 5 | Eskender Mustafaiev | 38.77 | Q | ||
| 2 | 4 | David Smetanine | 38.97 | Q | ||
| 3 | 3 | Kyunghyun Kim | 40.37 | Q | ||
| 4 | 6 | Christoffer Lindhe | 41.52 | Q | ||
| 5 | 7 | Arnost Petracek | 43.12 | |||
| 6 | 2 | Ronystony Cordeiro da Silva | 44.22 | |||
| 7 | 8 | Grant Patterson | 55.49 | |||
| 8 | 1 | Arnulfo Castorena | 1:03.49 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 4 | Eskender Mustafaiev | 38.26 | ||||
| 5 | David Smetanine | 38.75 | ||||
| 1 | Jan Povysil | 39.47 | ||||
| 4 | 2 | Richard Oribe | 39.47 | |||
| 5 | 3 | Gustavo Sanchez Martinez | 39.97 | |||
| 6 | 6 | Darko Duric | 40.21 | |||
| 7 | 8 | Christoffer Lindhe | 41.02 | |||
| 8 | 7 | Kyunghyun Kim | 42.49 |