| Final | | time | | | 1. Slobodan Branković |  Yugoslavia | 46.33s | | | 2. Andrea Nuti |  Italy | 46.37s | | | 3. David Grindley |  Great Britain | 46.60s | | | 4. Aleksejs Iljušinš |  Latvia | 47.02s | | | 5. Marco Vaccari | Italy | 47.18s | | | 6. Ade Mafe | Great Britain | 47.33s | |
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| | First - from each Semi advanced to Final. |
| Semi 1 | | time | | | 1. Slobodan Branković | Yugoslavia | 46.23s | Q, NR | | 2. Marco Vaccari | Italy | 46.34s | Q | | 3. Ade Mafe | Great Britain | 46.62s | Q | | 6. Jiří Janoušek |  Czechoslovakia | 46.98s | | | 10.Fabio Grossi | Italy | 47.60s | | | 11.Gary Cadogan | Great Britain | 47.85s | |
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| Semi 2 | | time | | | 4. Andrea Nuti | Italy | 46.65s | Q | | 5. Aleksejs Iljušinš | Latvia | 46.97s | Q, NR | | 7. David Grindley | Great Britain | 47.03s | Q | | 8. Manuel Moreno |  Spain | 47.33s | | | 9. Tsvetoslav Stankulov |  Bulgaria | 47.37s | | | 12.José Mendes |  Portugal | 48.18s | |
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| | | First - from each Heat and next Best 4 advanced to Semi-Finals. |
| Heat 1 | | time | | | 4. Aleksejs Iljušinš | Latvia | 47.58s | Q | | 6. Jiří Janoušek | Czechoslovakia | 47.69s | Q | | 7. Fabio Grossi | Italy | 47.72s | Q | | 8. José Mendes | Portugal | 47.80s | q | | 12.Gary Cadogan | Great Britain | 49.06s | q |
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| Heat 2 | | time | | | 1. Slobodan Branković | Yugoslavia | 46.85s | Q | | 2. Andrea Nuti | Italy | 46.86s | Q | | 3. David Grindley | Great Britain | 47.42s | Q | | 5. Manuel Moreno | Spain | 47.62s | q |
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| Heat 3 | | time | | | 9. Marco Vaccari | Italy | 48.13s | Q | | 10.Tsvetoslav Stankulov | Bulgaria | 48.18s | Q | | 11.Ade Mafe | Great Britain | 48.28s | Q | | -. Aivar Ojastu |  Estonia | DNS | |
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