A turbine for an exhaust gas turbocharger has a housing with two exhaust gas volutes, between which a separating wall is provided and which have a common waste-gate opening. The turbine housing is equipped with a linear valve, which has a valve element and a displacement shaft for actuating the valve element. The displacement shaft of the linear valve is led through the separating wall in a separating wall plane and, in the direction of the shaft longitudinal axis of the linear valve, is movably arranged in the separating wall. The valve element is arranged in a separating wall cutout between the exhaust gas volutes and is led out of the area of the exhaust gas volutes in the direction toward the waste-gate opening, toward a valve seat which is formed on the inner side of the waste-gate opening, facing the exhaust gas volutes.