PURPOSE: To simplify the structure of a turbosupercharger by eliminating an oil feeding pipe, by a method wherein a bearing housing for a turbo-supercharger is fixed to an engine body interposed by a mount provided to a bearing housing, and an oil path interconnecting to a lubricating oil path in an engine body is provided to the mount.

CONSTITUTION: The compressor C and a turbine are provided on both sides of a revolving shaft 10, which is supported by a bearing housing 11, interposed by a bearing seat 12, in a turbosupercharger. In this case, a bearing housing 11 is consisted of a mount 20, intergratedly provided to one side of a housing, and a supercharger is fitted by fixing the mount to the outer surface of an engine body 1 by bolts 21. The coil feeding path 23 and an oil exhausting path 24, extending from a lubricating chamber 22 in a housing 11 and opening to the contacted face of an engine body 1 with a mount, are formed in the mount 20. These oil paths 23 and 24 are respectively interconnected to a branch oil path 25a from a lubricating oil path 25 in an engine body 1, and a feedback oil pass 25b, connecting to an oil reservior.