To provide a retainer for bearings with high rigidity and high strength capable of maintaining lubrication performance inside a bearing constantly for a long period.

The retainer 11 for the roller bearing revolves together with each rolling element along the inside of the bearing while holding a plurality of rolling elements (a tapered roller) 5 freely rotatably, and is partitioned by a series of annular portions 2, 4 continuous along the inside of the bearing in a peripheral direction a plurality of pillars 6 arranged circumferentially at prescribed intervals after extending along the inside of the bearing from the circular ring and internal peripheral surfaces 2s, 4s of the circular ring portion and inner wall surfaces 6s of a plurality of pillars, and the retainer comprises a plurality of pockets 8 which hold freely rotatably a plurality of rolling elements one by one, and in the internal wall surface of the pillar, at least a contact portion 6a to contact each rolling element outside the virtual circle PCD which ties mutual centers of a plurality of rolling elements after constituting the window angle of 0-90 and an elongation part 6b which is situated in roughly inner side from the contact portion and marks a smaller angle than the window angle are provided.