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Summary
Semi-final 1
| Rank | Name | Nation | Time |
| 1 | Harvey Glance; John Jones; Millard Hampton; Steven Riddick | USA | 38.51 |
| 2 | Francisco Gomez; Alejandro Casanas; Hermes Ramirez; Silvio Leonard | CUB | 39.25 |
| 3 | Manfred Kokot; Jorg Pfeifer; Klaus-Dieter Kurrat; Alexander Thieme | GDR | 39.43 |
| 4 | Hugh Spooner; Marvin Nash; Albin Dukowski; Hugh Fraser | CAN | 39.46 |
| 5 | Michael Sharpe; Dennis Trott; Calvin Dill; Greg Simons | BER | 39.78 |
| 6 | Anthony Husbands; Chris Brathwaite; Charles Joseph; Francis Adams | TTO | 39.88 |
| 7 | Kraarsene Konan; Degnan Kablan; Gastom Kouadio; Meite Amadou | CIV | 40.64 |
| 8 | Anat Ratanapol; Suchart Jairsuraparp; Somsakdi Boontud; Sayan Paratanavong | THA | 40.68 |
| Rank | Name | Nation | Time |
| 1 | Andrzej Swierczynski; Marian Woronin; Bogdan Grzejszczak; Zenon Licznerski | POL | 39.09 |
| 2 | Jean-Claude Amoureux; Joseph Arame; Lucien Sainte-Rose; Dominique Chauvelot | FRA | 39.33 |
| 3 | Alexander Aksinin; Nikolai Kolesnikov; Yuriy Silov; Valeriy Borzov | URS | 39.36 |
| 4 | Vincenzo Guerini; Luciano Caravani; Luigi Benedetti; Pietro Mennea | ITA | 39.39 |
| 5 | Klaus Ehl; Klaus-Dieter Bieler; Dieter Steinmann; Reinhard Borchert | FRG | 39.58 |
| 6 | Christian do Rosario; Momar N'Dao; Barka Sy; Adama Fall | SEN | 40.37 |
| 7 | Danny Smith; Walter Edward Callander; Clive Sands; Leonard Jervis | BAH | 40.53 |
| Disqualified | |||
| Jose Luis Sanchez; Luis Sarria; Francisco Garcia; Javier Martinez | ESP | ||