Américo Rubén "El Tolo" Gallego (born 25 April 1955) is an Argentine football coach and former player. As a midfielder, he played 73 times for the Argentina national team during his playing career.
As a player, Gallego debuted in the Argentine league in 1974 as a midfielder for Newell's Old Boys. After a rookie season in which he saw little action, he quickly made a name for himself and was given a starting spot and regular playing time during the 1975 season. After being part of the Argentine national team that won the 1978 FIFA World Cup, Gallego stayed on at Newell's for three more years before being transferred to one of the two biggest teams in his country: River Plate.
Gallego played at River until the end of his career. He played for the "Millonarios" for seven years before retiring at the conclusion of the 1987/88 season. He is hailed as a legend at River, as he was the captain during the team's obtaining of their first Copa Libertadores, Intercontinental Cup and Copa Interamericana's in their rich history.