Abstract: This invention proposes a gas pump for use in metallurgical industry.The gas pump for stirring a molten metal (1) in a melting chamber (2) comprises a refractory-lined pipe (3) with a removable cover (5) formed with an opening (6) adapted to communicate an inner passage (4) of the pipe (3) with a compressed gas supply system (7) and with a vacuum system (8). The upper wall of the lower portion (11) of the pipe (3) is made thicker and is formed with at least one auxiliary duct (11) brought in communication with the inner passage (4) of the pipe (3) through a tangential inlet (9) having its outlet portion directed along the flow of metal at the moment of its expulsion from the pipe (3).