Rolling bearing

A rolling bearing, comprising:

• an inner bearing ring;
• an outer bearing ring disposed radially outward of said inner bearing ring forming an annular space therebetween;
• a cage arranged in the annular space between said inner and outer bearing rings, said cage having a plurality of rolling element receiving pockets arranged in a circumferential direction, said cage further including recess portions disposed between the rolling element receiving pockets in the circumferential direction, the recess portions each having a bottom surface and a pair of inclined surfaces inclined so as to be expanded from both sides of the bottom portion in a circumferential direction and radially outward;
• a plurality of rolling elements received in the rolling element receiving pockets in the cage;
• and
• at least one integrally formed solid lubricating agent being at least partially received in the recess portions in a state in which a back surface thereof is opposed to the inclined surface of the recess portion with a clearance therebetween, said at least one integrally formed solid lubricant including a first lubricating portion detachably fitted to the groove portion of the one bearing ring and a second lubricating portion bulged out to both sides of the first lubricating portion in the axial direction so as to be loosely fitted to the recess portion when at least partially received therein, a one of said inner and outer bearing rings including a groove portion forming a raceway surface of the rolling element on an opposing surface to another one of said inner and outer bearing rings, and a shoulder portion for holding the rolling element in both sides of the groove portion in an axial direction, both of said first and second lubricating portions having a back surface in a downstream side of said one of said bearing rings in a rotational direction.