The Men's 100 metre butterfly S8 event at the 2020 Paralympic Games took place on 3 September 2021, at the Tokyo Aquatics Centre.

Results Heats The swimmers with the top 8 times, regardless of heat, advanced to the final. Heat 1 Rank Lane Name Nationality Time Notes 1 4 1:02.521 2 3 1:04.272 3 1 1:04.843 4 7 1:05.695 5 2 1:05.776 6 6 1:06.177 7 8 1:11.868

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Heat 2

Rank Lane Name Nationality Time Notes 1 7 1:03.951 2 3 1:04.242 3 5 1:05.323 4 6 1:05.554 5 4 1:05.695 6 2 1:05.986 7 1 1:08.017 8 8 1:09.528

Source: Final

Rank Lane Name Nationality Time Notes 4 1:02.031 3 1:03.202 6 1:03.233 4 5 1:03.264 5 2 1:03.425 6 1 1:04.316 7 7 1:04.557 8 8 1:05.388

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