# Judo at the 1980 Summer Olympics – Men's open category

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.

## Results
### Pool A

| Round of 32 | Round of 32 | Round of 32 | Round of 16 | Round of 16 | Round of 16 | Quarterfinal | Quarterfinal | Quarterfinal | Semifinal | Semifinal | Semifinal |
| Walter Carmona (BRA) | Walter Carmona (BRA) | 5:00 | | | | | | | | | |
| Jaakko Saari (FIN) | Jaakko Saari (FIN) | E | Dimitar Zapryanov (BUL) | Dimitar Zapryanov (BUL) | 5:00 | | | | | | |
| Dimitar Zapryanov (BUL) | Dimitar Zapryanov (BUL) | | Walter Carmona (BRA) | Walter Carmona (BRA) | E | | | | | | |
| Bye | Bye | | | | | Arthur Mapp (GBR) | Arthur Mapp (GBR) | 5:00 | | | |
| Arthur Mapp (GBR) | Arthur Mapp (GBR) | 2:08 | | | | Dimitar Zapryanov (BUL) | Dimitar Zapryanov (BUL) | E | | | |
| Peter Adelaar (NED) | Peter Adelaar (NED) | E | Arthur Mapp (GBR) | Arthur Mapp (GBR) | 1:43 | | | | | | |
| John de Wet (ZIM) | John de Wet (ZIM) | | John de Wet (ZIM) | John de Wet (ZIM) | E | | | | | | |
| Bye | Bye | | | | | | | | Dietmar Lorenz (GDR) | Dietmar Lorenz (GDR) | 0:39 |
| Pavel Drăgoi (ROM) | Pavel Drăgoi (ROM) | 0:00 | | | | | | | Arthur Mapp (GBR) | Arthur Mapp (GBR) | R |
| Jean Zinneker (SUI) | Jean Zinneker (SUI) | wo | Dietmar Lorenz (GDR) | Dietmar Lorenz (GDR) | 0:57 | | | | | | |
| Dietmar Lorenz (GDR) | Dietmar Lorenz (GDR) | | Pavel Drăgoi (ROM) | Pavel Drăgoi (ROM) | R | | | | | | |
| Bye | Bye | | | | | Dietmar Lorenz (GDR) | Dietmar Lorenz (GDR) | 2:32 | | | |
| Dambajavyn Tsend–Ayuush (MGL) | Dambajavyn Tsend–Ayuush (MGL) | | | | | Dambajavyn Tsend–Ayuush (MGL) | Dambajavyn Tsend–Ayuush (MGL) | R | | | |
| Bye | Bye | | Dambajavyn Tsend–Ayuush (MGL) | Dambajavyn Tsend–Ayuush (MGL) | 5:00 | | | | | | |
| Abdoulaye Kote (SEN) | Abdoulaye Kote (SEN) | | Abdoulaye Kote (SEN) | Abdoulaye Kote (SEN) | E | | | | | | |
| Bye | Bye | | | | | | | | | | |

### Pool B

| Round of 32 | Round of 32 | Round of 32 | Round of 16 | Round of 16 | Round of 16 | Quarterfinal | Quarterfinal | Quarterfinal | Semifinal | Semifinal | Semifinal |
| Sergei Novikov (URS) | Sergei Novikov (URS) | 4:45 | | | | | | | | | |
| Kim Myong Gyu (PRK) | Kim Myong Gyu (PRK) | R | Sergei Novikov (URS) | Sergei Novikov (URS) | 0:00 | | | | | | |
| Ulf Ekberg (SWE) | Ulf Ekberg (SWE) | | Ulf Ekberg (SWE) | Ulf Ekberg (SWE) | wo | | | | | | |
| Bye | Bye | | | | | Sergei Novikov (URS) | Sergei Novikov (URS) | 3:51 | | | |
| Franz Berger (AUT) | Franz Berger (AUT) | | | | | Franz Berger (AUT) | Franz Berger (AUT) | E | | | |
| Bye | Bye | | Franz Berger (AUT) | Franz Berger (AUT) | 1:05 | | | | | | |
| Said Akhtar (SYR) | Said Akhtar (SYR) | | Said Akhtar (SYR) | Said Akhtar (SYR) | E | | | | | | |
| Bye | Bye | | | | | | | | Angelo Parisi (FRA) | Angelo Parisi (FRA) | 3:13 |
| András Ozsvár (HUN) | András Ozsvár (HUN) | 5:00 | | | | | | | Sergei Novikov (URS) | Sergei Novikov (URS) | R |
| Wojciech Reszko (POL) | Wojciech Reszko (POL) | E | András Ozsvár (HUN) | András Ozsvár (HUN) | 5:00 | | | | | | |
| Robert Van de Walle (BEL) | Robert Van de Walle (BEL) | | Robert Van de Walle (BEL) | Robert Van de Walle (BEL) | E | | | | | | |
| Bye | Bye | | | | | Angelo Parisi (FRA) | Angelo Parisi (FRA) | 5:00 | | | |
| Radomir Kovačević (YUG) | Radomir Kovačević (YUG) | | | | | András Ozsvár (HUN) | András Ozsvár (HUN) | R | | | |
| Bye | Bye | | Angelo Parisi (FRA) | Angelo Parisi (FRA) | 0:00 | | | | | | |
| Angelo Parisi (FRA) | Angelo Parisi (FRA) | | Radomir Kovačević (YUG) | Radomir Kovačević (YUG) | wo | | | | | | |
| Bye | Bye | | | | | | | | | | |

### Repechages

| Repechage semifinal | Repechage semifinal | Repechage semifinal | Repechage final | Repechage final | Repechage final |
| Dambajavyn Tsend–Ayuush (MGL) | Dambajavyn Tsend–Ayuush (MGL) | 2:16 | | | |
| Pavel Drăgoi (ROM) | Pavel Drăgoi (ROM) | E | | | |
| | | | Arthur Mapp (GBR) | Arthur Mapp (GBR) | 2:50 |
| | | | Dambajavyn Tsend–Ayuush (MGL) | Dambajavyn Tsend–Ayuush (MGL) | |
| Repechage | Repechage | Repechage | Repechage semifinal | Repechage semifinal | Repechage semifinal | Repechage final | Repechage final | Repechage final |
| | | | | | | András Ozsvár (HUN) | András Ozsvár (HUN) | 7:00 |
| | | | | | | Sergei Novikov (URS) | Sergei Novikov (URS) | |

### Final

| Final | Final |
| Dietmar Lorenz (GDR) | 7:00 |
| Angelo Parisi (FRA) | |