| Venue: Stadion Evžena Rošického |
| Final 20:00 | time | | | 1. Franz-Peter Hofmeister |  West Germany | 45.73s | | | 2. Karel Kolář |  Czechoslovakia | 45.77s | Nr | | 3. Francis Demarthon |  France | 45.97s | | | 4. Lothar Krieg | West Germany | 46.22s | | | 5. Terry Whitehead |  Great Britain | 46.23s | | | 6. Richard Ashton | Great Britain | 46.34s | | | 7. Bernd Herrmann | West Germany | 46.69s | | | -. Jerzy Pietrzyk |  Poland | DNS | |
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| Semi 1 | time | | | 1. Jerzy Pietrzyk | Poland | 46.27 | Q | | 2. Karel Kolář | Czechoslovakia | 46.28 | Q | | 3. Lothar Krieg | West Germany | 46.33 | Q | | 4. Terry Whitehead | Great Britain | 46.69 | Q | | 5. Glen Cohen | Great Britain | 46.91 | | | 6. Eddy De Leeuw |  Belgium | 47.17 | | | 7. Stefano Malinverni |  Italy | 47.18 | | | 8. Maurice Volmar | France | 47.50 | |
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| Semi 2 | time | | | 1. Bernd Herrmann | West Germany | 46.09 | Q | | 2. Franz-Peter Hofmeister | West Germany | 46.18 | Q | | 3. Francis Demarthon | France | 46.26 | Q | | 4. Richard Ashton | Great Britain | 46.32 | Q | | 5. Miroslav Tulis | Czechoslovakia | 46.37 | | | 6. Ryszard Podlas | Poland | 46.59 | | | 7. Viktor Burakov |  Soviet Union | 46.91 | | | 8. Jens Hansen |  Denmark | 47.35 | |
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| Heat 1 | time | | | 1. Karel Kolář | Czechoslovakia | 46.33 | Q | | 2. Jerzy Pietrzyk | Poland | 46.75 | Q | | 3. Viktor Burakov | Soviet Union | 47.18 | Q | | 4. Knapić Željko |  Yugoslavia | 47.51 | | | 5. Ornélien Gombault | France | 47.91 | | | 6. Mike Bayle |  Luxembourg | 48.71 | | | 7. Alfons Brijdenbach | Belgium | 53.05 | |
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| Heat 2 | time | | | 1. Franz-Peter Hofmeister | West Germany | 46.28 | Q | | 2. Richard Ashton | Great Britain | 46.63 | Q | | 3. Miroslav Tulis | Czechoslovakia | 46.77 | Q | | 4. Maurice Volmar | France | 46.94 | q | | 5. Eddy De Leeuw | Belgium | 47.27 | q | | 6. Koen Gijsbers |  Netherlands | 47.65 | |
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| Heat 3 | time | | | 1. Lothar Krieg | West Germany | 46.57 | Q | | 2. Francis Demarthon | France | 46.73 | Q | | 3. Glen Cohen | Great Britain | 47.05 | Q | | 4. Jens Hansen | Denmark | 47.28 | q | | 5. Rijk Van den Berghe | Belgium | 47.55 | | | 6. Ossi Karttunen |  Finland | 48.02 | |
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| Heat 4 | time | | | 1. Bernd Herrmann | West Germany | 46.50 | Q | | 2. Terry Whitehead | Great Britain | 46.61 | Q | | 3. Ryszard Podlas | Poland | 46.81 | Q | | 4. Stefano Malinverni | Italy | 47.03 | q | | 5. Markku Kukkoaho | Finland | 47.33 | | | 6. Frank Schaffer |  East Germany | 47.59 | |
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