2023 World Para Athletics Championships – Men's 400 metres

The men's 400 metres at the 2023 World Para Athletics Championships were held in Paris.

T11
 The event took place on 12 July.

T12
The final in this event took place at 19:55 on Sat 15 Jul 2023 at Charlety Stadium, Paris, France.

T13
The final of this event was held at 20:05 on 15 Jul 2023 at Charlety Stadium, Paris, France.

T20
The final of this event was held at 19:45 on 15 Jul 2023 at Charlety Stadium, Paris (France).

The applicable records entering the event were as follows:

T34
The event took place on 11 July.

T36
The event took place on 11 July.

T37
The event took place on 14 July.

T38
The event took place on 13 July.

T47
The event took place on 14 July.

T52
The event took place on 13 July.

T53
The event took place on 11 July.

T54
The event took place on 12 July.

T62
The event took place on 17 July.