| Final | time | age | | 1. David Wottle |  USA | 1:45.9 | 22 | | 2. Yevgeniy Arzhanov |  URS | 1:45.9 | 24 | | 3. Mike Boit |  KEN | 1:46.0 | 23 | | 4. Franz-Josef Kemper |  FRG | 1:46.5 | 26 | | 5. Robert Ouko | KEN | 1:46.5 | 23 | | 6. Andrew Carter |  GBR | 1:46.6 | 23 | | 7. Andrzej Kupczyk |  POL | 1:47.1 | 23 | | 8. Dieter Fromm |  GDR | 1:48.0 | 24 |
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| Semi 1 | time | | 1. Robert Ouko | KEN | 1:47.6 | | 2. Dieter Fromm | GDR | 1:48.1 | | 3. David Cropper | GBR | 1:48.4 | | 4. Josef Schmidt | FRG | 1:48.8 | | 5. Francis Murphy |  IRL | 1:49.2 | | 6. Azzedine Azzouzi |  ALG | 1:49.4 | | 7. Alain Sans |  FRA | 1:49.6 | | 8. Evgeni Volkov | URS | 1:50.1 |
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| Semi 2 | time | | 1. David Wottle | USA | 1:48.7 | | 2. Franz-Josef Kemper | FRG | 1:48.8 | | 3. Jozef Plachy |  TCH | 1:48.9 | | 4. Joze Medjimurec |  YUG | 1:49.0 | | 5. Ivan Ivanov | URS | 1:49.6 | | 6. Herman Mignon |  BEL | 1:49.7 | | 7. Mansour Guettaya |  TUN | 1:49.8 | | 8. Hussein Angelo K Nimir |  SUD | 1:51.1 |
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| Semi 3 | time | | 1. Mike Boit | KEN | 1:45.9 | | 2. Evgeni Arzhanov | URS | 1:46.3 | | 3. Andrew Carter | GBR | 1:46.5 | | 4. Andrzej Kupczyk | POL | 1:46.7 | | 5. Manuel Gayoso |  ESP | 1:47.7 | | 6. Rolf Gysin |  SUI | 1:48.2 | | 7. Mulugetta Tadesse |  ETH | 1:48.9 | | -. Kenneth Swenson | USA | DNF |
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| Heat 1 | time | | 1. Alain Sans | FRA | 1:49.2 | | 2. Mansour Guettaya | TUN | 1:49.4 | | 3. Azzedine Azzouzi | ALG | 1:49.4 | | 4. Richard Wohlhuter | USA | 1:49.4 | | 5. Reza Entezari |  IRN | 1:50.5 | | 6. Edouard Rasoanaivo |  MAD | 1:50.8 | | 7. Alphonse Mandonda |  CGO | 1:51.2 | | -. Mohammed Aboker |  SOM | DNS |
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| Heat 2 | time | | 1. Robert Ouko | KEN | 1:47.4 | | 2. Joze Medjimurec | YUG | 1:48.1 | | 3. Evgeni Volkov | URS | 1:48.6 | | 4. Fernando Eugenio Mamede |  POR | 1:48.6 | | 5. Sid-Ali Djoudi | ALG | 1:50.4 | | 6. Colin Campbell | GBR | 1:54.8 | | 7. Francisco Menocal |  NCA | 1:58.6 | | 8. Thomas O'Brien Howe |  LBR | 2:00.7 |
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| Heat 3 | time | | 1. Franz-Josef Kemper | FRG | 1:47.3 | | 2. David Cropper | GBR | 1:47.5 | | 3. Rolf Gysin | SUI | 1:47.5 | | 4. Roqui Sanchez | FRA | 1:47.9 | | 5. Thomas Saisi | KEN | 1:48.5 | | 6. Andras Zsinka |  HUN | 1:49.0 | | 7. Daniel Andrade |  SEN | 1:53.9 | | -. Saad Maaz Abdulrazak |  KSA | DNS |
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| Heat 4 | time | | 1. Mulugetta Tadesse | ETH | 1:47.1 | | 2. David Wottle | USA | 1:47.6 | | 3. Josef Schmidt | FRG | 1:47.8 | | 4. Graeme Rootham |  AUS | 1:48.2 | | 5. Lennox Stewart |  TRI | 1:48.7 | | 6. Thorst Thorsteinsson |  ISL | 1:50.8 | | 7. Roger Kangni |  TOG | 1:52.1 | | -. M'Hamad Amakdouf |  MAR | DNS |
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| Heat 5 | time | | 1. Evgeni Arzhanov | URS | 1:48.3 | | 2. Andrzej Kupczyk | POL | 1:48.5 | | 3. Hussein Angelo K Nimir | SUD | 1:48.9 | | 4. Gheorghe Ghipu |  ROU | 1:50.1 | | 5. Carlos Dalurzo |  ARG | 1:50.6 | | 6. Hector Lopez |  VEN | 1:50.8 | | -. Walter Adams | FRG | DNF | | -. Antonio Fernandez | ESP | DNS |
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| Heat 6 | time | | 1. Dieter Fromm | GDR | 1:46.9 | | 2. Jozef Plachy | TCH | 1:47.1 | | 3. Manuel Gayoso | ESP | 1:47.5 | | 4. Sriram Singh |  IND | 1:47.7 | | 5. Francis Gonzales | FRA | 1:48.8 | | 6. Mehmet Tuemkan |  TUR | 1:49.5 | | 7. Hamze Kassem |  LIB | 1:52.5 | | 8. Harry Nkopeka |  MAW | 1:57.7 |
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| Heat 7 | time | | 1. Mike Boit | KEN | 1:47.3 | | 2. Herman Mignon | BEL | 1:47.5 | | 3. Andrew Carter | GBR | 1:47.6 | | 4. Byron Dyce |  JAM | 1:48.0 | | 5. Benson Mulomba |  ZAM | 1:53.4 | | 6. Jimmy Crampton |  BIR | 1:54.2 | | 7. Fritz Pierre |  HAI | 2:01.5 | | -. Franco Arese |  ITA | DNS |
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| Heat 8 | time | | 1. Ivan Ivanow | URS | 1:51.0 | | 2. Kenneth Swenson | USA | 1:51.1 | | 3. Francis Murphy | IRL | 1:51.1 | | 4. Sjef Hensgens |  NED | 1:51.2 | | 5. Donaldo Arza |  PAN | 1:51.2 | | 6. Jaiye Abidoye |  NGR | 1:52.0 | | 7. M Seediq |  PAK | 1:52.6 | | 8. Shibrou Regassa | ETH | 1:53.3 |
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