| Rubén Gajardo | |
| Birth Date: | 5 January 1968 |
| Careerprizemoney: | $11,871 |
| Singlesrecord: | 1–3 |
| Highestsinglesranking: | No. 348 (11 Apr 1994) |
| Doublesrecord: | 0–3 |
| Highestdoublesranking: | No. 375 (3 Aug 1987) |
Rubén Gajardo (born 5 January 1968) is a Chilean former professional tennis player.
Gajardo, a South American Games silver medalist for Chile, began competing on the professional tour in the late 1980s. He had a career high singles ranking of 348, with his best Challenger performance a semi-final appearance at Ostend in 1988.[1] At Grand Prix level he made a second round once, when he beat Andrei Olhovskiy at Kitzbühel in 1989.[2]