Cage for a bearing which is only axially insertable from one side of a bearing which comprises inner race and outer race rings both provided with an integral flange and rows of rolling elements running in race ways between the rings, each two adjacent rolling elements out of two rows in circumferential direction of the bearing being separated in relation to the next pairs of rolling elements by a bearing cage member, characterized in that the bearing cage-partition member has such a shape that it is elastically compressible at least in radial direction, such that the rolling elements during loading of the bearing both in the same as well as in the adjacent race way can take relatively small distance differences in relation to each other.