| Event: | Men's Open |
| Games: | 1980 Summer |
| Venue: | Palace of Sports of the Central Lenin Stadium |
| Date: | August 2 |
| Competitors: | 18 |
| Nations: | 18 |
| Gold: | Dietmar Lorenz |
| Goldnoc: | GDR |
| Silver: | Angelo Parisi |
| Silvernoc: | FRA |
| Bronze: | Arthur Mapp |
| Bronzenoc: | GBR |
| Bronze2: | András Ozsvár |
| Bronzenoc2: | HUN |
| Prev: | 1976 |
| Next: | 1984 |
Men's Open category competition in Judo at the 1980 Summer Olympics in Moscow, Soviet Union was held at Palace of Sports of the Central Lenin Stadium. The gold medal was won by Dietmar Lorenz from East Germany.[1]