| Order / Lane | ATHLETE | COUNTRY | PB | SB 1983 | 
|---|---|---|---|---|
| Amadou Dia Ba |  SEN | 50.59 | 50.59 | |
| Ahmed Hamada |  BRN | 50.53 | 50.53 | |
| Aleksandr Kharlov |  URS | 48.78 | 48.78 | |
| Franz Meier |  SUI | 50.00 | 50.09 | |
| Edwin Moses |  USA | 47.13 | 47.84 | |
| Andre Phillips |  USA | 50.44 | 50.44 | |
| Rik Tommelein |  BEL | 50.99 | 50.99 | |
| Toma Tomov |  BUL | 50.39 | 50.39 | 
| Order / Lane | ATHLETE | COUNTRY | PB | SB 1983 | 
|---|---|---|---|---|
| José Alonso |  ESP | 50.53 | 50.53 | |
| Krasimir Demirev |  BUL | 50.45 | 50.62 | |
| David Lee |  USA | 50.15 | 50.15 | |
| Sven Nylander |  SWE | 50.23 | 50.23 | |
| Daniel Ogidi |  NGR | 50.44 | 50.44 | |
| Harald Schmid |  FRG | 47.48 | 49.99 | |
| Karl Smith |  JAM | 50.64 | 50.64 | |
| Ryszard Szparak |  POL | 50.09 | 50.09 |