An angular ball bearing includes an outer ring having a raceway surface on the inner circumferential surface thereof, a shoulder portion on one side of the raceway surface and a counter bore on the other side thereof; an inner ring having a raceway surface on the outer circumferential surface thereof, a shoulder portion on the other side of the raceway surface and a counter bore on one side thereof; and a plurality of balls provided between the raceway surfaces of the outer ring and the inner ring so as to be rotatable at a contact angle. The outer diameter dimension of the shoulder portion of the inner ring is larger than the inner diameter dimension of the shoulder portion of the outer ring, and the shoulder portion of the outer ring and the shoulder portion of the inner ring are overlapped with each other when viewed in the axial direction.