These are the official results of the Men's 20 km Walk event at the 1987 World Championships in Rome, Italy. The race was held on Sunday, August 30, 1987.
| Gold |  Maurizio DamilanoItaly (ITA) | |
| Silver | Jozef Pribilinec Czechoslovakia (TCH) | |
| Bronze |  Josep MarínSpain (ESP) |
| DNS | did not start | |
| NM | no mark | |
| WR | world record | |
| AR | area record | |
| CR | event record | |
| NR | national record | |
| PB | personal best | |
| SB | season best |
| Standing records prior to the 1987 World Athletics Championships | |||||
|---|---|---|---|---|---|
| 1:19.12 | June 21, 1987 | Karl-Marx-Stadt, East Germany | |||
| 1:20.49 | August 7, 1983 |  Helsinki, Finland | |||
| Broken records during the 1987 World Athletics Championships | |||||
| 1:20.45 | August 30, 1987 | Rome, Italy | |||
| RANK | FINAL | TIME | |
|---|---|---|---|
| 1:20.45 CR | |||
| 1:21.07 | |||
| 1:21.24 | |||
| 4. | 1:21.53 | ||
| 5. | 1:22.53 | ||
| 6. | 1:23.01 | ||
| 7. | 1:23.38 | ||
| 8. | 1:23.42 | ||
| 9. | 1:23.51 | ||
| 10. | 1:24.14 | ||
| 11. | 1:24.37 | ||
| 12. | 1:24.46 | ||
| 13. | 1:24.51 | ||
| 14. | 1:25.01 | ||
| 15. | 1:25.08 | ||
| 16. | 1:25.10 | ||
| 17. | 1:25.12 | ||
| 18. | 1:25.24 | ||
| 19. | 1:26.00 | ||
| 20. | 1:26.09 | ||
| 21. | 1:27.06 | ||
| 22. | 1:27.24 | ||
| 23. | 1:27.27 | ||
| 24. | 1:27.32 | ||
| 25. | 1:27.33 | ||
| 26. | 1:27.34 | ||
| 27. | 1:27.40 | ||
| 28. | 1:28.07 | ||
| 29. | 1:28.08 | ||
| 30. | 1:28.29 | ||
| 31. | 1:28.40 | ||
| 32. | 1:28.44 | ||
| 33. | 1:29.22 | ||
| 34. | 1:32.36 | ||
| 35. | 1:34.26 | ||
| - | DNF | ||
| - | DNF | ||
| - | DSQ | ||
| - | DSQ | ||
| - | DSQ | ||
| - | DSQ | ||
| - | DSQ |