The men's 400 metres event at the 2014 African Championships in Athletics was held August 10–12 on Stade de Marrakech.[1]
| width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
| Isaac Makwala | Wayde van Niekerk | Boniface Mucheru |
Qualification: First 3 of each heat (Q) and the next 4 fastest (q) qualified for the semifinals.
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 45.87 | Q | |||
| 2 | 4 | 46.07 | Q | |||
| 3 | 3 | 46.12 | Q | |||
| 4 | 3 | 46.58 | Q | |||
| 5 | 1 | 46.78 | Q | |||
| 5 | 2 | 46.78 | Q | |||
| 7 | 1 | 46.80 | Q | |||
| 8 | 1 | 46.82 | Q | |||
| 9 | 2 | 46.88 | Q | |||
| 10 | 2 | 46.90 | Q | |||
| 11 | 2 | 46.93 | q | |||
| 12 | 4 | 46.96 | Q | |||
| 13 | 3 | 46.98 | Q | |||
| 14 | 4 | 47.07 | q | |||
| 15 | 1 | 47.08 | q | |||
| 15 | 4 | 47.08 | q | |||
| 17 | 3 | 47.12 | ||||
| 18 | 3 | 47.26 | ||||
| 19 | 2 | 47.31 | ||||
| 20 | 1 | 47.41 | ||||
| 21 | 4 | 48.07 | ||||
| 22 | 3 | 48.24 | ||||
| 23 | 1 | 48.67 | ||||
| 24 | 3 | 49.51 | ||||
| 25 | 3 | 51.49 | ||||
| 26 | 2 | 51.76 | ||||
| 1 | R162.6[2] | |||||
| 4 |
Qualification: First 3 of each semifinal (Q) and the next 2 fastest (q) qualified for the final.
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 2 | 45.58 | Q | |||
| 2 | 1 | 45.62 | Q | |||
| 3 | 2 | 45.74 | Q | |||
| 4 | 2 | 45.86 | Q | |||
| 5 | 2 | 46.28 | q | |||
| 6 | 1 | 46.38 | Q | |||
| 7 | 1 | 46.65 | Q | |||
| 8 | 2 | 46.67 | q | |||
| 9 | 2 | 46.77 | ||||
| 10 | 1 | 46.90 | ||||
| 11 | 1 | 47.07 | ||||
| 12 | 1 | 47.09 | ||||
| 13 | 2 | 47.86 | ||||
| 14 | 2 | 48.79 | ||||
| 1 | ||||||
| 1 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 4 | 44.23 | CR | ||||
| 2 | 45.00 | |||||
| 3 | 45.07 | |||||
| 4 | 5 | 45.27 | ||||
| 5 | 1 | 45.40 | ||||
| 6 | 6 | 45.50 | ||||
| 7 | 7 | 46.40 | ||||
| 8 | 8 | 46.94 |