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Date: 30 August 1972 / 30 August 1972 / 31 August 1972
Heats
Semi-finals
Final
| Rank | Name | Nation | Time |
| 1 | Mark Spitz | USA | 54.27 |
| 2 | Bruce Robertson | CAN | 55.56 |
| 3 | Jerry Heidenreich | USA | 55.74 |
| 4 | Roland Matthes | GDR | 55.87 |
| 5 | David Edgar | USA | 56.11 |
| 6 | Byron MacDonald | CAN | 57.27 |
| 7 | Hartmut Flockner | GDR | 57.40 |
| 8 | Neil Rogers | AUS | 57.90 |
| Semi-finals | |||
| 9 | Juan Bello | PER | 57.51 |
| 10 | Robert Kasting | CAN | 57.67 |
| 11 | Roger Pyttel | GDR | 57.69 |
| 12 | Sergio Waismann | BRA | 58.07 |
| 13 | John Mills | GBR | 58.13 |
| 14 | Istvan Szentirmay | HUN | 58.25 |
| 15 | Lutz Stocklasa | FRG | 58.33 |
| 16 | Geoffrey Ferreira | TTO | 58.54 |
| Heats | |||
| 17 | Viktor Sharygin | URS | 58.40 |
| 18 | Jacques Leloup | BEL | 58.77 |
| 19 | Peter Remmel | FRG | 58.97 |
| 20 | Hans Lampe | FRG | 59.00 |
| 21 | Arturo Lang Lenton | ESP | 59.22 |
| 22 | Georgy Kulikov | URS | 59.28 |
| 23 | Sean Maher | GBR | 59.50 |
| 24 | Yasuhiro Komazaki | JPN | 59.71 |
| 25 | Vladimir Krivzov | URS | 59.83 |
| 26 | Dimitrios Karydis | GRE | 1:00.06 |
| 27 | Vassil Dobrev | BUL | 1:00.07 |
| 28 | Hugo Valencia | MEX | 1:00.14 |
| 29 | Andrzej Chudzinski | POL | 1:00.22 |
| 30 | Alain Mosconi | FRA | 1:00.23 |
| 31 | Aleksandar Pavlicevic | YUG | 1:00.29 |
| 32 | Salvador Vilanova | ESA | 1:01.25 |
| 33 | Martin Edwards | GBR | 1:01.29 |
| 34 | Carlos Singson Brosas | PHI | 1:02.11 |
| 35 | Roy Kum Wah Chan | SIN | 1:02.24 |
| 36 | Feridun Aybars | TUR | 1:04.46 |
| 37 | Nhem Chhay-Kheng | CAM | 1:05.12 |
| 38 | Bruno Bassoul | LBN | 1:05.46 |
| 39 | Ronnie Man Chui Wong | HKG | 1:07.50 |
| Did not start | |||
| Hsu Tung-Hsiung | TPE | ||