The men's 100 metres T47 event at the 2020 Summer Paralympics in Tokyo, took place on 27 August 2021.

The T47 category is for athletes who have a single below elbow or wrist amputation or similar disability, with normal function in both legs.

Prior to the competition, the existing records were as follows:[1] Heat 1 took place on 27 August 2021, at 12:29:[2] Heat 2 took place on 27 August 2021, at 12:36:[3] The final took place on 27 August 2021, at 19:33:[4]