PURPOSE: To provide a bearing housing for an exhaust gas turbine supercharger having an oil feed passage by which a sufficient wall thickness can be secured around an oil feed hole without using an oblique hole and sufficient oil can be fed to a floating bearing.

CONSTITUTION: In a bearing housing 4 for an exhaust gas turbine supercharger where a turbine 2 and an air blower 1 are fixed to both ends of a rotary shaft 3 and an intermediate part of the rotary shaft is supported with bearings 5, the bearing housing has an oil feed passage composed of a horizontal hole 10 almost in parallel with the rotary shaft 3, a vertical hole 12 almost vertical to the rotary shaft 3 while crossing this horizontal hole 10 and a semicircular groove 14 which has the center between the axis of the rotary shaft 3 and the center of the horizontal hole 10 and communicates bearing holes 13 to house the bearings 5 with the horizontal hole.