| Venue: Olympic Stadium - Moulay Abdellah Sports Complex. Final: Wednesday 28th August 2019 1-:-- |
| Final | time | | 1. Leungo Scotch |  Botswana | 45.27s | | 2. Thapelo Phora |  South Africa | 45.59s | | 3. Chidi Okezie |  Nigeria | 45.61s | | 4. Gilles Anthony Afoumba |  Congo | 45.96s | | 5. Alphas Kishoyian |  Kenya | 45.97s | | 6. Ifeanyi Emmanuel Ojeli | Nigeria | 46.05s | | 7. Ditiro Nzamani | Botswana | 46.15s | | 8. Gardeo Isaacs | South Africa | 46.79s |
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| | | First 4 from each of 2 Semi-Finals advanced to Final. |
| Ranking | time | | S | | 1. Leungo Scotch | Botswana | 45.52s | Q | 1 | | 2. Thapelo Phora | South Africa | 45.67s | Q | 3 | | 3. Chidi Okezie | Nigeria | 46.20s | Q | 3 | | 4. Ifeanyi Emmanuel Ojeli | Nigeria | 46.21s | Q | 1 | | 5. Gilles Anthony Afoumba | Congo | 46.22s | q | 3 | | 6. Ditiro Nzamani | Botswana | 46.23s | Q | 2 | | 7. Gardeo Isaacs | South Africa | 46.52s | q | 1 | | 8. Isaac Makwala | Botswana | 46.55s | | 3 | | 9. Alphas Kishoyian | Kenya | 46.61s | Q | 2 | | 10.Sadam Koumi |  Sudan | 46.63s | | 3 | | 11.Va-Sheku Sheriff |  Sierra Leone | 46.66s | | 1 | | 12.Derrick Mokaleng | South Africa | 46.67s | | 2 | | 13.Joseph Poghisio Loshangar | Kenya | 46.69s | | 1 | | 14.Andile Lusenga |  Eswatini | 46.78s | | 1 | | 15.Cheikh Tidiane Diouf |  Senegal | 46.85s | | 3 | | 16.Kennedy Luchembe |  Zambia | 46.98s | | 3 | | 17.Modou Lamin Bah |  Gambia | 47.09s | | 3 | | 18.Frederick Mendy | Senegal | 47.41s | | 1 | | 19.Leonard Opiny |  Uganda | 47.56s | | 2 | | 20.Said El Guebbaz |  Morocco | 47.78s | | 1 | | 21.Haron Adoli | Uganda | 48.01s | | 2 | | -. Gideon Ernst Narib |  Namibiaa | DNF | | 2 | | -. Jeremy Cotte |  Mauritius | DQ | | 2 | | -. Erayokan Orukpe | Nigeria | DNS | | 2 |
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Heats - Monday 26.08 | | First 3 from each of 6 heats and Best 6 times advanced to Semi-Finals. |
| Ranking | time | | H | | 1. Derrick Mokaleng | South Africa | 46.41s | Q | 4 1. | | 2. Ditiro Nzamani | Botswana | 46.42s | Q | 1 1. | | 3. Alphas Kishoyian | Kenya | 46.46s | Q | 1 2. | | 4. Ifeanyi Emmanuel Ojeli | Nigeria | 46.48s | Q | 4 2. | | 5. Chidi Okezie | Nigeria | 46.65s | Q | 3 1. | | 6. Thapelo Phora | South Africa | 46.83s | Q | 5 1. | | 7. Gilles Anthony Afoumba | Congo | 46.87s | Q | 3 2. | | 8. Erayokan Orukpe | Nigeria | 46.94s | Q | 1 3. | | 9. Va-Sheku Sheriff | Sierra Leone | 46.98s | Q | 4 3. | | 10.Leonard Opiny | Uganda | 47.05s | q | 4 4. | | 11.Kennedy Luchembe | Zambia | 47.07s | Q | 5 2. | | 12.Gardeo Isaacs | South Africa | 47.15s | q | 1 4. | | 13.Leungo Scotch | Botswana | 47.32s | Q | 2 1. | | 14.Cheikh Tidiane Diouf | Senegal | 47.39s | Q | 3 3. | | 15.Joseph Poghisio Loshangar | Kenya | 47.41s | Q | 6 1. | | 16.Isaac Makwala | Botswana | 47.48s | q | 4 5. | | 17.Modou Lamin Bah | Gambia | 47.51s | q | 3 4. | | 18.Andile Lusenga | Eswatini | 47.53s | q | 3 5. | | 19.Sadam Koumi | Sudan | 47.58s | Q | 5 3. | | 20.Gideon Ernst Narib | Namibiaa | 47.68s | q | 3 6. | | 21.Said El Guebbaz | Morocco | 47.72s | Q | 6 2. | | 22.Leon Tafirenyika |  Zimbabwe | 47.73s | | 4 6. | | 23.Alexander Bock | Namibiaa | 47.78s | | 5 4. | | 24.Haron Adoli | Uganda | 47.87s | Q | 2 2. | | 25.Djakaridia Bamba |  Mali | 47.98s | | 1 5. | | 26.Nsangou Tetndap |  Cameroon | 48.06s | | 3 7. | | 27.Frederick Mendy | Senegal | 48.23s | Q | 2 3. | | 28.Dickson Kapandura | Zimbabwe | 48.42s | | 5 5. | | 29.Moussa Zaroumey |  Niger | 48.46s | | 5 6. | | 29.Jeremy Cotte | Mauritius | 48.46s | Q | 6 3. | | 31.Abduraman Abdo |  Ethiopia | 48.60s | | 1 6. | | 32.Golden Gunde |  Malawi | 48.67s | | 2 4. | | 32.Efrem Mekonnen | Ethiopia | 48.67s | | 6 4. | | 34.Raymond Kibet | Kenya | 48.86s | | 4 7. | | 35.Ali Khamis Gulam |  Tanzania | 48.96s | | 4 8. | | 36.Stefano Bibi |  Seychelles | 49.04s | | 6 5. | | 37.Rodwell Leroy Ndlovu | Zimbabwe | 49.05s | | 1 7. | | 38.Bachir Ahmat Mahamat |  Chad | 49.14s | | 2 5. | | 39.Mustefa Edeo | Ethiopia | 49.21s | | 2 6. | | 40.Akoon Akoon |  South Sudan | 49.77s | | 1 8. | | 41.Esmaiel Freitas |  Sao Tome Principe | 50.33s | | 6 6. | | 42.Alford Conteh | Sierra Leone | 50.35s | | 2 7. | | 43.Benjamini Michael Kulwa | Tanzania | 50.85s | | 6 7. | | -. Younes Chattoui | Morocco | DNS | | 5 - |
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