Athletics at the 2020 Summer Paralympics – Men's 400 metres T54

The men's 400 metres T54 event at the 2020 Summer Paralympics in Tokyo, took place on 29 August 2021.

Records
Prior to the competition, the existing records were as follows:

Heats
Heat 1 took place on 29 August 2021, at 11:43:

Heat 2 took place on 29 August 2021, at 11:51:

Heat 3 took place on 29 August 2021, at 11:59:

Final
The final took place on 29 August 2021, at 20:21: