The Men's 55 kg event at the 2010 South American Games was held on March 21.
Medalists edit
| Gold | Silver | Bronze |
Armando Maita Venezuela
|
Cristhian Gabriel Vera Ecuador
|
Andres Alezander Muñoz ColombiaJuan Pablo Vital  Argentina
|
Results edit
Main Bracket edit
| Quarterfinals | Semifinals | Final | ||||||||||||
| Armando Maita (VEN)
| 0201 | |||||||||||||
 Adolfo Alvarez (CHI)
| 0001 | Armando Maita (VEN)
| 012 | |||||||||||
| Andres Alezander Muñoz (COL)
| 0103 | |||||||||||||
| Armando Maita (VEN)
| 100 | |||||||||||||
 John Arcentales (PER)
| 000 | Cristhian Gabriel Vera (ECU)
| 000 | |||||||||||
| Juan Pablo Vital (ARG)
| 101 | Juan Pablo Vital (ARG)
| 0012 | |||||||||||
| Cristhian Gabriel Vera (ECU)
| 0032 | |||||||||||||
Repechage edit
| Round 1 | Round 2 | |||||
| Adolfo Alvarez (CHI) | Adolfo Alvarez (CHI) | 0001 | ||||
| bye | Juan Pablo Vital (ARG) | 1001 | ||||
| John Arcentales (PER) | John Arcentales (PER) | 000 | ||||
| bye | Andres Alezander Muñoz (COL) | 100 | ||||