To provide a compact bearing having a long service life, and receiving a radial load, a bidirectional axial load and a moment load under a service condition of being large in a difference in the load size received in the both shaft directions.

A plurality of rolling bodies 5 and 5' are incorporated between an outer race 1 and an inner race 2 having respectively two raceway surfaces. The outer-inner races have the raceway surfaces 1a-1b and 2a-2b having a diameter larger than a radius of the rolling bodies 5 and 5'. In the respective rolling bodies 5 and 5', an outer diameter becoming a rolling contact surface also has curvature in the shaft direction. The rolling bodies 5 and 5' adjacent on the circumference are alternately arranged across each other. The outer diameter of the respective rolling bodies respectively contacts at two points in total by one point on the raceway surface of always opposed one bearing ring and the raceway surface of the other bearing ring. A value of a contact angle of one directional rolling body 5 and an inner-outer race raceway surface 1a-2b arranged across each other on the circumference is set different from a value of a contact angle of the other directional rolling body 5' and an inner-outer race raceway surface 1b-2a.