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| | First - from each Semi advanced to Final. |
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| | | First - from each Heat and next Best 4 advanced to Semi-Finals. |
| 4. Thomas Schönlebe |  East Germany | 47.01s | Q | | 5. Ervin Katona |  Hungary | 47.14s | Q | | 6. Klaus Just |  West Germany | 47.14s | q | | 1. Cayetano Cornet |  Spain | 46.00s | Q | | 2. Jens Carlowitz | East Germany | 46.21s | Q | | 4. Olivier Noirot |  France | 46.73s | q | | 6. Carsten Köhrbrück | West Germany | 46.81s | | | 9. Gary Cadogan |  Great Britain | 47.28s | | | -. Thomas Schönlebe | East Germany | DNF | |
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| 1. Cayetano Cornet | Spain | 46.69s | Q | | 8. Todd Bennett | Great Britain | 47.19s | Q | | 11.Luboš Balošák |  Czechoslovakia | 47.85s | | | 12.Pedro Curvelo |  Portugal | 47.97s | | | 18.Gunnar Guðmundsson |  Iceland | 49.40s | | | 3. Thomas Schönlebe | East Germany | 46.48s | Q | | 5. Norbert Dobeleit | West Germany | 46.79s | Q | | 7. Klaus Just | West Germany | 46.88s | | | 8. Todd Bennett | Great Britain | 47.23s | | | 10.Ervin Katona | Hungary | 48.01s | | | 3. Cayetano Cornet | Spain | 46.91s | |
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| 2. Norbert Dobeleit | West Germany | 46.88s | Q | | 7. Jens Carlowitz | East Germany | 47.15s | Q | | 10.Gary Cadogan | Great Britain | 47.58s | q | | 13.Tamás Molnár | Hungary | 48.03s | | | 16.Niklas Wallenlind |  Sweden | 49.04s | | | 2. Jens Carlowitz | East Germany | 46.09s | |
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| 3. Olivier Noirot | France | 46.90s | Q | | 9. Carsten Köhrbrück | West Germany | 47.20s | Q | | 14.Athanassios Kalogiannis |  Greece | 48.28s | | | 15.Andrea Nuti |  Italy | 48.54s | | | 17.Slobodan Branković |  Yugoslavia | 49.34s | | | 4. Olivier Noirot | France | 47.76s | |
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