| Event: | Men's 100 metre freestyle S13 |
| Games: | 2020 Summer |
| Venue: | Tokyo Aquatics Centre |
| Dates: | 25 August 2021 |
| Competitors: | 13 |
| Nations: | 9 |
| Gold: | Ihar Boki |
| Goldnpc: | BLR |
| Silver: | Oleksii Virchenko |
| Silvernpc: | UKR |
| Bronze: | Islam Aslanov |
| Bronzenpc: | UZB |
The Men's 100 metre butterfly S13 event at the 2020 Paralympic Games took place on 25 August 2021, at the Tokyo Aquatics Centre.
The swimmers with the top 8 times, regardless of heat, advanced to the final.[1]
| Rank | Heat | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|---|
| 1 | 2 | 4 | 55.12 | ||||
| 2 | 2 | 5 | 56.30 | ||||
| 3 | 1 | 4 | 57.29 | ||||
| 4 | 1 | 5 | 57.60 | ||||
| 5 | 1 | 3 | 57.73 | ||||
| 6 | 1 | 6 | 58.66 | ||||
| 7 | 2 | 3 | 58.80 | ||||
| 8 | 2 | 6 | 59.92 | ||||
| 9 | 1 | 2 | 1:00.69 | ||||
| 10 | 1 | 7 | 1:01.14 | ||||
| 11 | 2 | 2 | 1:02.21 | ||||
| 12 | 2 | 1 | 1:03.01 | ||||
| 13 | 2 | 7 | 1:03.68 |
| Rank | Lane | Name | Nationality | Time | Notes | +100m butterfly final | 4 | 53.80 | PR | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5 | 56.16 | |||||||||||
| 3 | 57.12 | |||||||||||
| 4 | 6 | 57.13 | ||||||||||
| 5 | 2 | 57.44 | ||||||||||
| 6 | 1 | 58.15 | ||||||||||
| 7 | 7 | 58.53 | ||||||||||
| 8 | 8 | 58.63 |