| Full Name: | Eduardo Esteban Martínez |
| Nickname: | Mono |
| Height: | 1.92 m |
| Birth Place: | Necochea, Argentina |
| Position: | Outside hitter |
| Teamnumber: | 3 |
| Nationalyears: | 1981–1990 |
Eduardo Esteban "Mono" Martínez (born 25 September 1961 in Necochea) is a retired volleyball player from Argentina. He represented his country in four Summer Olympics, starting in 1984 (Los Angeles, California).
Martínez was a member of the men's national indoor team that won the bronze medal at the 1988 Summer Olympics in Seoul, South Korea. In the 1990s, he started a career in beach volleyball, partnering with Martín Conde in the 1996 and 2000 Summer Olympics.