# Judo at the 2004 Summer Olympics – Men's 66 kg

Men's 66 kg competition in judo at the 2004 Summer Olympics was held on August 15 at the Ano Liossia Olympic Hall.
This event was the second-lightest of the men's judo weight classes, limiting competitors to a maximum of 66 kilograms of body mass. Like all other judo events, bouts lasted five minutes. If the bout was still tied at the end, it was extended for another five-minute, sudden-death period; if neither judoka scored during that period, the match is decided by the judges. The tournament bracket consisted of a single-elimination contest culminating in a gold medal match. There was also a repechage to determine the winners of the two bronze medals. Each judoka who had lost to a semifinalist competed in the repechage. The two judokas who lost in the semifinals faced the winner of the opposite half of the bracket's repechage in bronze medal bouts.

## Schedule

All times are Greece Standard Time (UTC+2)
| Date | Time | Round |
| Sunday, 15 August 2004 | 10:30 13:00 17:00 | Preliminaries Repechage Final |

## Tournament results
### Final

| Final | Final | Final |
| 1 | Masato Uchishiba (JPN) | 1000 |
| 2 | Jozef Krnáč (SVK) | 0000 |

### Mat 1

| First round | First round | First round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| Yordanis Arencibia (CUB) | Yordanis Arencibia (CUB) | 0101 | | | | | | | | | |
| Ludwig Ortíz (VEN) | Ludwig Ortíz (VEN) | 0010 | Yordanis Arencibia (CUB) | Yordanis Arencibia (CUB) | 1001 | | | | | | |
| Heath Young (AUS) | Heath Young (AUS) | 0103 | Heath Young (AUS) | Heath Young (AUS) | 0001 | | | | | | |
| Juan José Paz (BOL) | Juan José Paz (BOL) | 0000 | | | | Yordanis Arencibia (CUB) | Yordanis Arencibia (CUB) | 1001 | | | |
| Elchin Ismaylov (AZE) | Elchin Ismaylov (AZE) | 0012 | | | | João Pina (POR) | João Pina (POR) | 0001 | | | |
| Miklós Ungvári (HUN) | Miklós Ungvári (HUN) | 1010 | Miklós Ungvári (HUN) | Miklós Ungvári (HUN) | 0001 | | | | | | |
| João Pina (POR) | João Pina (POR) | 1100 | João Pina (POR) | João Pina (POR) | 0011 | | | | | | |
| Musa Nastuyev (UKR) | Musa Nastuyev (UKR) | 0010 | | | | | | | Yordanis Arencibia (CUB) | Yordanis Arencibia (CUB) | 0002 |
| Óscar Peñas (ESP) | Óscar Peñas (ESP) | 1000 | | | | | | | Jozef Krnáč (SVK) | Jozef Krnáč (SVK) | 1010 |
| Melvin Méndez (PUR) | Melvin Méndez (PUR) | 0000 | Óscar Peñas (ESP) | Óscar Peñas (ESP) | 0000 | | | | | | |
| Jozef Krnáč (SVK) | Jozef Krnáč (SVK) | 0200 | Jozef Krnáč (SVK) | Jozef Krnáč (SVK) | 1011 | | | | | | |
| Abdou Alassane Dji Bo (NIG) | Abdou Alassane Dji Bo (NIG) | 0000 | | | | Jozef Krnáč (SVK) | Jozef Krnáč (SVK) | 1001 | | | |
| Amar Meridja (ALG) | Amar Meridja (ALG) | 1000 | | | | Amar Meridja (ALG) | Amar Meridja (ALG) | 0000 | | | |
| Amin El Hady (EGY) | Amin El Hady (EGY) | 0001 | Amar Meridja (ALG) | Amar Meridja (ALG) | 0010 | | | | | | |
| Ehud Vaks (ISR) | Ehud Vaks (ISR) | WO | Ehud Vaks (ISR) | Ehud Vaks (ISR) | 0000 | | | | | | |
| Arash Miresmaili (IRI) | Arash Miresmaili (IRI) | | | | | | | | | | |

### Mat 2

| Round of 32 | Round of 32 | Round of 32 | Round of 16 | Round of 16 | Round of 16 | Quarter Finals | Quarter Finals | Quarter Finals | Semi Finals | Semi Finals | Semi Finals |
| Magomed Dzhafarov (RUS) | Magomed Dzhafarov (RUS) | 0013 | | | | | | | | | |
| Alex Ottiano (USA) | Alex Ottiano (USA) | 0001 | Magomed Dzhafarov (RUS) | Magomed Dzhafarov (RUS) | 0101 | | | | | | |
| Bang Gui-man (KOR) | Bang Gui-man (KOR) | 0000 | Henrique Guimarães (BRA) | Henrique Guimarães (BRA) | 0010 | | | | | | |
| Henrique Guimarães (BRA) | Henrique Guimarães (BRA) | 1001 | | | | Magomed Dzhafarov (RUS) | Magomed Dzhafarov (RUS) | 0000 | | | |
| Giorgi Vazagashvili (GRE) | Giorgi Vazagashvili (GRE) | 0010 | | | | Masato Uchishiba (JPN) | Masato Uchishiba (JPN) | 1001 | | | |
| Gantömöriin Dashdavaa (MGL) | Gantömöriin Dashdavaa (MGL) | 0100 | Gantömöriin Dashdavaa (MGL) | Gantömöriin Dashdavaa (MGL) | 0000 | | | | | | |
| Masato Uchishiba (JPN) | Masato Uchishiba (JPN) | 1011 | Masato Uchishiba (JPN) | Masato Uchishiba (JPN) | 1001 | | | | | | |
| Jorge Lencina (ARG) | Jorge Lencina (ARG) | 0000 | | | | | | | Masato Uchishiba (JPN) | Masato Uchishiba (JPN) | 1000 |
| Juan Carlos Jacinto (DOM) | Juan Carlos Jacinto (DOM) | 0000 | | | | | | | Georgi Georgiev (BUL) | Georgi Georgiev (BUL) | 0000 |
| Muratbek Kipshakbayev (KAZ) | Muratbek Kipshakbayev (KAZ) | 0100 | Muratbek Kipshakbayev (KAZ) | Muratbek Kipshakbayev (KAZ) | 0002 | | | | | | |
| Miloš Mijalković (SCG) | Miloš Mijalković (SCG) | 0101 | Miloš Mijalković (SCG) | Miloš Mijalković (SCG) | 0001 | | | | | | |
| Murat Kalikulov (UZB) | Murat Kalikulov (UZB) | 0100 | | | | Muratbek Kipshakbayev (KAZ) | Muratbek Kipshakbayev (KAZ) | 0001 | | | |
| Larbi Benboudaoud (FRA) | Larbi Benboudaoud (FRA) | 0021 | | | | Georgi Georgiev (BUL) | Georgi Georgiev (BUL) | 0100 | | | |
| Bektas Demirel (TUR) | Bektas Demirel (TUR) | 1100 | Bektas Demirel (TUR) | Bektas Demirel (TUR) | 0001 | | | | | | |
| Georgi Georgiev (BUL) | Georgi Georgiev (BUL) | 1010 | Georgi Georgiev (BUL) | Georgi Georgiev (BUL) | 1020 | | | | | | |
| David Margoshvili (GEO) | David Margoshvili (GEO) | 0012 | | | | | | | | | |

### Repechage

Those judoka eliminated in earlier rounds by the four semifinalists of the main bracket advanced to the repechage. These matches determined the two bronze medalists for the event.
| First round | First round | Second round | Second round | Third round | Third round | Bronze medal finals | Bronze medal finals |
| Ludwig Ortíz (VEN) | 1000 | João Pina (POR) | 0030 | | | | |
| Heath Young (AUS) | 0000 | Ludwig Ortíz (VEN) | 0001 | João Pina (POR) | 0002 | Georgi Georgiev (BUL) | 0001 |
| Abdou Alassane Dji Bo (NIG) | 0000 | Amar Meridja (ALG) | 0001 | Óscar Peñas (ESP) | 0010 | Óscar Peñas (ESP) | 0000 |
| Óscar Peñas (ESP) | 1001 | Óscar Peñas (ESP) | 0020 | | | | |
| Jorge Lencina (ARG) | 1011 | Magomed Dzhafarov (RUS) | 0001 | | | | |
| Gantömöriin Dashdavaa (MGL) | 0001 | Jorge Lencina (ARG) | 1001 | Jorge Lencina (ARG) | 0000 | Yordanis Arencibia (CUB) | 0200 |
| David Margoshvili (GEO) | 0120 | Muratbek Kipshakbayev (KAZ) | 0001 | David Margoshvili (GEO) | 1000 | David Margoshvili (GEO) | 0000 |
| Bektas Demirel (TUR) | 0001 | David Margoshvili (GEO) | 0010 | | | | |