Badminton at the 2020 Summer Paralympics – Men's singles SU5

The men's singles SU5 tournament at the 2020 Summer Paralympics in Tokyo took place between 1 and 4 September 2021 at Yoyogi National Gymnasium.

Seeds
These were the seeds for this event:
 * 1) (silver medalist)
 * 2)  (gold medalist)

Group stage
The draw of the group stage revealed on 26 August 2021. The group stage was played from 1 to 3 September. The top two winners of each group advanced to the knockout rounds.

Finals
The knockout stage was played on 4 September.