To reduce the vibration generated in rotating a turbine shaft of a turbo charger and to suppress the generation of the sound by reducing the weight of oil film dampers supported from the circumferences of ball bearings of the turbine shaft in a turbine shaft penetration part of a bearing housing.

This bearing structure for the turbo charger is formed by integrally connecting a turbine housing 1 with a compressor housing 2 via the bearing housing 3. This bearing structure is provided with the ball bearings 25 and 26 fitted in the axial both ends of the turbine shaft penetration part of the bearing housing 3 as journal bearings 3a and the oil film dampers 27 inserted in the outside diameter parts of the respective bearings 25 and 26 for absorbing the vibration of the ball bearings 25 and 26 and composed of an approximately cylindrical heat-resistant synthetic resin material.