The result late on Saturday ended a three-game winless run for Lanus and moved them equal on points with leaders Boca Juniors and second-placed Argentinos Juniors, reports Xinhua news agency.
Fourth-placed River Plate are two points further back but have two games in hand, starting with Sunday's home match against San Lorenzo. Racing remained fifth in the 24-team standings, one point adrift of River.
Earlier on Saturday, Arsenal Sarandi rose to eighth after goals from Juan Cruz and Juan Garcia gave them a 2-0 win at Huracan.
In other matches, Newell's Old Boys drew 2-2 at Atletico Tucuman and Union Santa Fe held Talleres to a goalless draw in Cordoba.