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 (2) and an outer peripheral surface (16) of the outer ring housing (10) is supplied into the rolling bearing (20) via a portion between the axial end surface (17) of the outer ring housing (10) and a side wall surface (6) in the casing (2), and the oil passing through the rolling bearing (20) is discharged from an annular space (50) through the discharge hole (15). The axial end surface (17) of the outer ring housing (10) has a notch groove (14) serving as a flow path of oil and passing through the end surface (17) in a radial direction.