Swimming at the 2017 Summer Universiade – Men's 100 metre butterfly

The Men's 100 metre butterfly competition at the 2017 Summer Universiade was held on 24 and 25 August 2017.

Records
Prior to the competition, the existing world and Universiade records were as follows.

Heats
The heats were held on 24 August at 9:32.

Semifinals
The semifinals were held on 24 August at 19:23.

Final
The final was held on 25 August at 19:19.