To provide a bearing having rigidity and rolling life similar to those of a conventional fixed double row angular ball bearing or other types of two single row conical roller bearings while hardly receiving the influences of the quantity or viscosity of a lubricating material.

In the fixed double row angular ball bearing 20, an intentional pitch difference P3 is provided between an outer ring raceway pitch P1 and an inner ring raceway pitch P2 to cause a relative pitch difference P3 between the inner and outer rings in the axial direction. In the case where a first load as load conditions during city road travel is applied between the outer ring 21 and the inner ring 22, the inner and outer rings are relatively moved in the axial direction and balls 23a, 23b are grounded on raceways 24a, 24b, when the ball 23b in one row is grounded on the raceway 24b, the ball 23a in the other row is prevented from being grounded on the raceway 24a by the existence of relative dislocation between the outer ring 21 and the inner ring 22 in the axial direction. Outer force, if smaller, is supported only by the ball 23b in the row where it is first grounded on the raceway.