RETAINER AND BEARING DEVICE

Provided are a retainer cage and a bearing device capable of suppressing fluctuation of torque. A bearing device of the present disclosure includes: an inner ring having an outer circumferential track surface on an outer circumferential surface; an outer ring having an inner circumferential track surface on an inner circumferential surface; a plurality of balls disposed between the outer circumferential track surface and the inner circumferential track surface; and a retainer cage. The retainer cage includes: a plurality of columns disposed between the inner ring and the outer ring of the bearing device and provided at equal intervals in a circumferential direction around an axis of the inner ring; and a plurality of column joints connecting the columns to each other. The portion between the plurality of columns makes a pocket in which the ball is disposed. The column has an end surface facing a direction, being one direction out of axial directions parallel to the axis. The end surface has a recess recessed to the other direction out of the axial directions.