A bearing device 1 has a cylindrical outer ring housing 10 provided in a casing 2 and having a discharge hole 15 of oil in an axially central portion and rolling bearings 20. Oil supplied to a portion between an inner peripheral surface 5 of the casing and an outer peripheral surface 16 of the outer ring housing is supplied into the rolling bearing via a portion between the axial end surface 17 of the outer ring housing and a side wall surface 6 in the casing, and the oil passing through the rolling bearing is discharged from an annular space 50 through the discharge hole. The axial end surface of the outer ring housing has a notch groove 14 serving as a flow path of oil and passing through the end surface in a radial direction.