The Men's 400 metres T13 at the 2024 Summer Paralympics took place on 5 September 2024 at the Stade de France in Paris.

[1] The T12 classification is for visually impaired athletes with a LogMAR between 1 and 1.4, and/or a maximum visual acuity range of 40 degrees.

[2][3] The final was held on 5 September 2024, starting at 10:21 (UTC+2) in the morning session.