400 meter Men Heats, Heat:4 of 7 ; Official result since 12:43
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 4 | 581 | NYAMBE Patrick Kakozi | 45.87 | ZAM | Senior | 46.68 | Q | |
| 2 | 3 | 468 | MENDY Frédéric | SEN | Senior | 46.78 | Q | ||
| 3 | 2 | 274 | SEEWUA William | 46.57 | KEN | Senior | 46.80 | Q | |
| 4 | 1 | 426 | NATHANIEL Samson | 45.82 | NGR | Senior | 47.01 | q | |
| 5 | 6 | 652 | RAMI Balti | TUN | Senior | 47.73 | |||
| 6 | 8 | 32 | HOUNTHON Edmond | 48.3 | BEN | Senior | 47.75 | ||
| 7 | 5 | 203 | TADESSE Yohanes Tefera | 46.56 | ETH | Senior | 49.48 | ||
| 8 | 7 | 307 | ESSABAI Ahmed | 48.35 | LBA | Senior | 52.63 |