To provide a rolling bearing capable of securely holding lubricant in a holder, and to provide a lubricant filling method.

In this rolling bearing, an annular base part 10 of the holder 6 has a projection part 15 projecting inward in the radial direction from the inner peripheral surface between pockets 5 and 5. The projection part 15 works as a wall for preventing passing of the lubricant filled between the pockets 5 and 5 in the axial direction through a clearance between the annular base part 10 of the holder 6 and an inner ring 1. The annular base part 10 of the holder 6 has an axial directional projection 13 projecting in the axial direction between the pockets 5 and 5. This axial directional projection 13 takes a part for stopping a flow of the lubricant filled between the pockets 5 and 5 there, and works as a mark for determining a radial directional position of a filling nozzle when filling the lubricant between the pockets 5 and 5.