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Summary
Quarter-final 1
| Rank | Name | Nation | Time |
| 1 | Arthur Wint | JAM | 46.9 |
| 2 | James Lavery | CAN | 47.5 |
| 3 | Lars-Erik Wolfbrandt | SWE | 47.8 |
| 4 | Guillermo Gutierrez | VEN | 48.6 |
| 5 | Leslie Lewis | GBR | 49.0 |
| 6 | Hans Schneider | SUI | 49.2 |
| Rank | Name | Nation | Time |
| 1 | George Rhoden | JAM | 47.2 |
| 2 | Ollie Matson | USA | 47.4 |
| 3 | Karl-Friedrich Haas | GER | 47.4 |
| 4 | Morris Curotta | AUS | 48.8 |
| 5 | Rolf Back | FIN | 51.1 |
| Rank | Name | Nation | Time |
| 1 | Malvin Whitfield | USA | 47.6 |
| 2 | Hans Geister | GER | 47.7 |
| 3 | John Carroll | CAN | 47.7 |
| 4 | Louis van Biljon | RSA | 48.5 |
| 5 | Jacques Degats | FRA | 48.8 |
| 6 | Alan Dick | GBR | 49.0 |
| Rank | Name | Nation | Time |
| 1 | Herb McKenley | JAM | 47.4 |
| 2 | Gerrard Cole | USA | 47.7 |
| 3 | Ardalion Ignatyev | URS | 48.0 |
| 4 | Yves Camus | FRA | 48.1 |
| 5 | Terence Higgins | GBR | 49.1 |