Gustavo Rojas (born 28 September 1967) is an Argentine professional golfer.

In 2002, he was tied with Ángel Cabrera in the Argentine PGA Championship after 54 holes, but torrential rain meant that the final round was cancelled and the two shared the title.

He has struggled to establish himself at the highest level, and has often had to return to the tours qualifying school.

His best tournament finishes on the elite tour have been a pair of joint 5th places at the 2000 BMW International Open and the 2001 Via Digital Open de España.

On the Challenge Tour he has enjoyed more success, winning the Open dei Tessali in 1999 and having several runners-up finishes, including three losses in playoffs.