Abstract: The disclosure relates to an exhaust gas turbine of an exhaust gas turbocharger. The exhaust gas turbine has a turbine housing and a bearing bore passing through the housing wall thereof, having a bearing bush, which is arranged in a fixed manner in the bore and in which a valve spindle of the wastegate valve device is passed outward from the interior of the turbine housing through the bearing bore of the housing wall and is mounted so as to be rotatable about its spindle axis. The bearing bush in each case intermeshes in the axial direction in the manner of a labyrinth seal, at least at one of its axial ends, with an adjusting lever connecting flange and/or a valve spindle shoulder by at least one axially extending sealing web and at least one sealing groove, complementary thereto, which are circumferential with respect to the spindle axis.