2018 African Swimming Championships – Men's 400 metre individual medley
# 2018 African Swimming Championships – Men's 400 metre individual medley

The Men's 400 metre individual medley competition of the 2018 African Swimming Championships was held on 11 September 2018.

## Records

Prior to the competition, the existing world and championship records were as follows.

| | Name | Nation | Time | Location | Date |
| - | - | - | - | - | - |
| World record | Michael Phelps | United States | 4:03.84 | Beijing | 10 August 2008 |
| African record | Oussama Mellouli | Tunisia | 4:10.53 | Pescara | 29 June 2009 |
| Championship record | Jay-Cee Thomson | South Africa | 4:21.06 | Casablanca | 14 September 2010 |

## Results

### Final

The final was started on 11 September.

| Rank | Name | Nationality | Time |
| - | - | - | - |
| | Ayrton Sweeney | South Africa | 4:21.69 |
| | Ruan Breytenbach | South Africa | 4:25.80 |
| | Ahmed Hamdy | Egypt | 4:26.73 |
| 4 | Ramzi Chouchar | Algeria | 4:29.82 |
| 5 | Haythem Mbarki | Tunisia | 4:32.15 |
| 6 | Mohamed Malek Masmoudi | Tunisia | 4:32.28 |
| 7 | Said Saber | Morocco | 4:32.71 |
| 8 | Mathieu Marquet | Mauritius | 4:47.78 |
