The men's 400 metres event at the 2023 African Games was held on 18, 19 and 20 March 2024 in Accra, Ghana.[1]
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
| Chidi Okezie | Muzala Samukonga | Cheikh Tidiane Diouf |
Held on 18 March
Qualification: First 3 in each heat (Q) and the next 6 fastest (q) advanced to the semifinals.[2]
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 5 | 45.64 | Q | |||
| 2 | 2 | 45.89 | Q | |||
| 3 | 6 | 46.11 | Q | |||
| 4 | 6 | 46.11 | Q | |||
| 5 | 2 | 46.18 | Q | |||
| 6 | 4 | 46.21 | Q | |||
| 7 | 1 | 46.23 | Q | |||
| 8 | 4 | 46.29 | Q | |||
| 9 | 3 | 46.30 | Q | |||
| 10 | 5 | 46.41 | Q | |||
| 11 | 6 | 46.43 | Q | |||
| 12 | 6 | 46.45 | q | |||
| 13 | 1 | 46.46 | Q | |||
| 14 | 3 | 46.48 | Q | |||
| 15 | 4 | 46.60 | Q | |||
| 16 | 6 | 46.68 | q | |||
| 17 | 1 | 46.72 | Q | |||
| 18 | 5 | 46.84 | Q | |||
| 19 | 2 | 47.05 | Q | |||
| 20 | 1 | 47.21 | q | |||
| 21 | 3 | 47.29 | Q | |||
| 22 | 5 | 47.35 | q | |||
| 23 | 4 | 47.56 | q | |||
| 24 | 1 | 47.59 | q | |||
| 25 | 1 | 47.65 | ||||
| 26 | 2 | 47.66 | ||||
| 27 | 2 | 47.69 | ||||
| 28 | 2 | 47.70 | ||||
| 29 | 5 | 47.72 | ||||
| 30 | 3 | 47.85 | ||||
| 31 | 4 | 48.06 | ||||
| 32 | 1 | 48.20 | ||||
| 33 | 3 | 48.24 | ||||
| 34 | 3 | 48.37 | ||||
| 35 | 6 | 48.52 | ||||
| 36 | 6 | 48.68 | ||||
| 37 | 5 | 48.91 | ||||
| 38 | 3 | 49.16 | ||||
| 39 | 2 | 49.26 | ||||
| 40 | 5 | 49.44 | ||||
| 41 | 3 | 49.91 | ||||
| 42 | 4 | 50.81 | ||||
| 4 |
Held on 19 March
Qualification: First 2 in each semifinal (Q) and the next 2 fastest (q) advanced to the final.[3]
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 3 | 45.51 | Q | |||
| 2 | 2 | 45.59 | Q | |||
| 3 | 1 | 45.63 | Q | |||
| 4 | 1 | 45.87 | Q | |||
| 5 | 3 | 45.89 | Q | |||
| 5 | 3 | 45.89 | Q | |||
| 7 | 3 | 45.95 | q | |||
| 8 | 1 | 46.16 | ||||
| 9 | 2 | 46.17 | Q | |||
| 10 | 2 | 46.39 | ||||
| 11 | 1 | 46.40 | ||||
| 12 | 1 | 46.48 | ||||
| 13 | 2 | 46.66 | ||||
| 14 | 3 | 46.77 | ||||
| 15 | 3 | 46.84 | ||||
| 16 | 1 | 47.13 | ||||
| 17 | 2 | 47.25 | ||||
| 18 | 2 | 47.28 | ||||
| 19 | 2 | 47.48 | ||||
| 20 | 1 | 48.01 | ||||
| 21 | 3 | 48.09 | ||||
| 22 | 2 | 50.13 | ||||
| 1 | ||||||
| 3 |
Held on 20 March[4]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 3 | 45.06 | |||||
| 5 | 45.37 | |||||
| 6 | 45.49 | |||||
| 4 | 4 | 45.81 | ||||
| 5 | 8 | 46.09 | ||||
| 6 | 1 | 46.16 | ||||
| 7 | 2 | 46.65 | ||||
| 8 | 7 | 47.13 |