Athletics at the 2015 African Games – Men's 400 metres

The men's 400 metres event at the 2015 African Games was held between 13 and 15 September.

Heats
Qualification: First 4 in each heat (Q) and the next 8 fastest (q) advanced to the semifinals.

Semifinals
Qualification: First 2 in each semifinal (Q) and the next 2 fastest (q) advanced to the final.