A rolling bearing comprises an inner race (1), an outer race (2), and a number of rolling members (3) between. A number of generally cylindrical rolling retainers (4) are arranged between rolling members (3). A pair or rings (5) contact the retainers (4) externally. A pair of covers (6) each defining a support rail (6a) support the retainers (4) internally. Thus the retainers (4) are held in position. In another embodiment, the covers (6) contact the retainers (4) externally, and the rings (5) internally. |