An exhaust gas turbine in an exhaust gas turbocharger is provided with a rotatably mounted turbine wheel in a housing, the exhaust gas can be fed via an inlet flow which is discharged via an outlet channel from the exhaust gas turbine. In the turbine inlet cross-section in the transition from the inlet flow to the turbine wheel, a guide grid and a cooperating axial slide is arranged. The guide baffle is mounted fixed to the housing, the axial slide is arranged on the side facing the outlet channel side. The remote from the outlet channel, housing-fixed boundary wall of the turbine inlet cross-section includes axially flush with the turbine wheel blades.