The Men's Keirin event at the 2010 South American Games was held on March 21. The qualifications and repechage were held on the morning and the semifinals and finals on the evening.
Medalists
edit| Gold | Silver | Bronze |
Leonardo Narváez Colombia
|
Christian Tamayo Colombia
|
Mauricio Quiroga Argentina
|
Results
editFirst round
editHeat 1
edit| Rank | Rider | Q |
|---|---|---|
| 1 | Leonardo Narváez (COL) |
Q |
| 2 | Diego Fernando Vargas (ARG) |
Q |
| 3 |  Cesar Marcano (VEN) |
|
| 4 |  Pablo Esteban Zelada (CHI) |
|
| 5 |  Fernando Fermino (BRA) |
|
| 6 |  Jair Tjon En Fa (SUR) |
Heat 2
edit| Rank | Rider | Q |
|---|---|---|
| 1 | Christian Tamayo (COL) |
Q |
| 2 | Davi Romeo (BRA) |
Q |
| 3 | Mauricio Quiroga (ARG) |
|
| 4 | Juan Sivira (VEN) |
|
| 5 |  Gabriel Aguiar (URU) |
|
| Christian Andres Zelada (CHI) |
Repechage
editRepechage 1
edit| Rank | Rider | Q |
|---|---|---|
| 1 | Cesar Marcano (VEN) |
Q |
| 2 | Juan Sivira (VEN) |
|
| 3 | Gabriel Aguiar (URU) |
|
| Jair Tjon En Fa (SUR) |
DNS |
Repechage 2
edit| Rank | Rider | Q |
|---|---|---|
| 1 | Mauricio Quiroga (ARG) |
Q |
| 2 | Christian Andres Zelada (CHI) |
|
| 3 | Fernando Fermino (BRA) |
|
| 4 | Pablo Esteban Zelada (CHI) |
Final
edit| Rank | Rider |
|---|---|
 |
Leonardo Narváez (COL)
|
 |
Christian Tamayo (COL)
|
 |
Mauricio Quiroga (ARG)
|
| 4 | Davi Romeo (BRA)
|
| 5 | Cesar Marcano (VEN)
|
| Diego Fernando Vargas (ARG)
|