To provide a cage for a bearing capable of introducing a lubricant into the bearing from the outside of the bearing directly and keeping the lubrication performance of the bearing constant for a long time.

This cage for the bearing revolving while holding a plurality of rolling elements (rollers) 5 rotatably is provided with at least one annular ring part 2 or 4 continuous in the peripheral direction along the inside of the bearing, a plurality of pillars 6 extending along the inside of the bearing from the annular ring parts and arranged at a predetermined interval in the peripheral direction along the annular ring parts, and a plurality of pockets 8 partitioned by the annular ring parts and the plurality of pillars to hold the plurality of rolling elements one by one rotatably. For example, the annular ring part 2 having a small diameter has at least one through hole H passing through its outer face (an outer peripheral face 2m) to an inner face (an inner peripheral face 2s) toward the pocket, and the lubricant J for lubricating in the bearing can be directly introduced into the through hole from the outer face side of the annular ring part.

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