Swimming at the 2017 World Aquatics Championships – Men's 100 metre backstroke

The Men's 100 metre backstroke competition at the 2017 World Championships was held on 24 and 25 July 2017.

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

Heats
The heats were held on 24 July at 09:47.

Semifinals
The semifinals were held on 24 July at 17:48.

Final
The final was held on 25 July at 18:36.