Rubén Hugo Marín (born May 1, 1934) is a former Argentine Senator for La Pampa Province. He was also a governor of the province on two occasions.Marín, a lawyer by profession, is a member of the Argentine Justicialist Party. Voters returned Marín to the governor's post in 1991, and he was re-elected in 1995 and 1999. He was elected to the Senate in 2003; there, he joined the majority Front for Victory parliamentary group, supporting the national government of President Néstor Kirchner.