The Men's 400 metres T38 at the 2024 Summer Paralympics took place 3 September at the Stade de France in Paris.

The T38 category is for ambulant athletes with cerebral palsy.

T38 athletes have the mildest form of impairment caused by cerebral palsy, often in only one limb, and not affecting the ability to run, walk or jump freely, although impairing performance.

T38 athletes may suffer minor co-ordination difficulties.

The final in this classification took place on 3 September 2024, at 11:05: