| Date | 29 July 1980 — 10:00 | |
|---|---|---|
| Status | Olympic | |
| Location | Dvorets sporta, Tsentralny stadion imeni V. I. Lenina, Moskva | |
| Participants | 23 from 23 countries | |
| Format | Two single-elimination pools, with winner of each pool advanced to the final. All judoka losing to the winner of each pool advanced to repêchage pools, with the winners of the repêchage pools earning bronze medals. | |
This was the class most affected by the boycott as Japan’s Shozo Fujii, four-time World Champion, was not present. In addition the 1980 European Champion, Neil Adams, dropped back to the lightweight class in Moskva. In their absence, the class came down, as did many in 1980 judo, to Soviet, Cuban, and East German fighters. The final matched Shota Khabareli (USSR and Georgia) against Cuba’s Juan Ferrer. Ferrer opened with koka at 23 seconds, but Khabarelli equaled the match at two minutes, and made the winning move at four minutes, scoring a yuko from ouchi-gari. The bronze medalists, Bernard Tchoullouyan of France and Harald Heinke of East Germany, had also won medals in this class at the 1979 Worlds.
| Date | 29 July 1980 |
|---|
| Date | 29 July 1980 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 29 Jul | Chris Bowles | GBR | Yusei-gachi | Philippe Simo | CMR | |
| Match #2 | 29 Jul | Bernard Tchoullouyan | FRA | bye | |||
| Match #3 | 29 Jul | Berkane Adda | ALG | Ippon | Jarosław Brawata | POL | |
| Match #4 | 29 Jul | António Roquete | POR | bye | |||
| Match #5 | 29 Jul | Juan Ferrer | CUB | Waza-ari | Dave McManus | IRL | |
| Match #6 | 29 Jul | Slavko Sikirić | YUG | bye | |||
| Match #7 | 29 Jul | Ignacio Sanz | ESP | Ippon | Bassam El-Jabbin | SYR | |
| Match #8 | 29 Jul | Dovdongiin Dashjamts | MGL | bye |
| Date | 29 July 1980 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 29 Jul | Bernard Tchoullouyan | FRA | Yusei-gachi | Chris Bowles | GBR | |
| Match #2 | 29 Jul | António Roquete | POR | Waza-ari | Berkane Adda | ALG | |
| Match #3 | 29 Jul | Juan Ferrer | CUB | Yuko | Slavko Sikirić | YUG | |
| Match #4 | 29 Jul | Ignacio Sanz | ESP | Ippon | Dovdongiin Dashjamts | MGL |
| Date | 29 July 1980 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 29 Jul | Bernard Tchoullouyan | FRA | Ippon | António Roquete | POR | |
| Match #2 | 29 Jul | Juan Ferrer | CUB | Ippon | Ignacio Sanz | ESP |
| Date | 29 July 1980 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 29 Jul | Juan Ferrer | CUB | Ippon | Bernard Tchoullouyan | FRA |
| Date | 29 July 1980 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 29 Jul | Slavko Sikirić | YUG | Yusei-gachi | Dave McManus | IRL | |
| Match #2 | 29 Jul | Ignacio Sanz | ESP | Ippon | Slavko Sikirić | YUG | |
| Match 3/5 | 29 Jul | Bernard Tchoullouyan | FRA | Waza-ari awasete ippon | Ignacio Sanz | ESP |
| Date | 29 July 1980 |
|---|
| Date | 29 July 1980 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 29 Jul | Harald Heinke | GDR | Koka | Karim Badiane | SEN | |
| Match #2 | 29 Jul | Shota Khabareli | URS | bye | |||
| Match #3 | 29 Jul | Vladimír Bárta | TCH | Ippon | Henry Sichalwe | ZAM | |
| Match #4 | 29 Jul | Georgi Petrov | BUL | bye | |||
| Match #5 | 29 Jul | Carlos Alberto Cunha | BRA | Waza-ari | Michel Grant | SWE | |
| Match #6 | 29 Jul | Thomas Hagmann | SUI | bye | |||
| Match #7 | 29 Jul | Mircea Frățică | ROU | Waza-ari | János Gyáni | HUN | |
| Match #8 | 29 Jul | Jang Il-Nam | PRK | bye |
| Date | 29 July 1980 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 29 Jul | Shota Khabareli | URS | Koka | Harald Heinke | GDR | |
| Match #2 | 29 Jul | Georgi Petrov | BUL | Yusei-gachi | Vladimír Bárta | TCH | |
| Match #3 | 29 Jul | Carlos Alberto Cunha | BRA | Yusei-gachi | Thomas Hagmann | SUI | |
| Match #4 | 29 Jul | Mircea Frățică | ROU | Fusen-gachi | Jang Il-Nam | PRK | walkover |
| Date | 29 July 1980 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 29 Jul | Shota Khabareli | URS | Koka | Georgi Petrov | BUL | |
| Match #2 | 29 Jul | Mircea Frățică | ROU | Ippon | Carlos Alberto Cunha | BRA |
| Date | 29 July 1980 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 29 Jul | Shota Khabareli | URS | Yuko | Mircea Frățică | ROU |
| Date | 29 July 1980 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match #1 | 29 Jul | Harald Heinke | GDR | Yuko | Georgi Petrov | BUL | |
| Match 3/5 | 29 Jul | Mircea Frățică | ROU | Yuko | Harald Heinke | GDR |
| Date | 29 July 1980 |
|---|
| Match | Date/Time | Competitor | NOC | Result | Competitor | NOC | |
|---|---|---|---|---|---|---|---|
| Match 1/2 | 29 Jul | Shota Khabareli | URS | Yuko | Juan Ferrer | CUB |