A bearing for a clutch comprising: an outer ring intergrally including an outer ring raceway formed on an inner peripheral surface thereof, an outer ring small-diameter part extending toward one axial side with respect to the outer ring raceway, an outer ring large-diameter part extending toward the other axial side with respect to the outer ring raceway, a radial wall part extending from an axial end portion of the outer ring small-diameter part toward an inner diameter-side, and a folded-back part extending from a radially inner end portion of the radial wall part toward the other axial side, the outer ring being a press-molded product; an inner ring including an inner ring raceway formed on an outer peripheral surface thereof, an inner ring small-diameter part extending toward one axial side with respect to the inner ring raceway, and an inner ring large-diameter part extending toward the other axial side with respect to the inner ring raceway; a plurality of balls rollably arranged between the outer ring raceway and the inner ring raceway, the plurality of balls being in contact with both the raceways at predetermined contact angles, and a cage configured to rollably hold the plurality of balls, wherein the folded-back part of the outer ring radially overlaps the inner ring small-diameter part with a radial gap between the folded-back part and an inner peripheral surface of the inner ring small-diameter part, characterized in that the radial gap of an inner diameter-side entry formed by an axial end of the folded-back part and the inner peripheral surface of the inner ring small-diameter part is smaller than the radial gap of an inner diameter-side exit formed by an axial end of the inner ring small-diameter part and an outer peripheral surface of the folded-back part, limiting the amount of lubricant to be supplied from the inner diameter-side entry gap to the bearing smoothly introducing the lubricant from the inner diameter-side exit gap to the inside of the bearing and controlling an oil amount of a flow of the lubricant, and that the inner ring is a rotating ring. an outer ring intergrally including an outer ring raceway formed on an inner peripheral surface thereof, an outer ring small-diameter part extending toward one axial side with respect to the outer ring raceway, an outer ring large-diameter part extending toward the other axial side with respect to the outer ring raceway, a radial wall part extending from an axial end portion of the outer ring small-diameter part toward an inner diameter-side, and a folded-back part extending from a radially inner end portion of the radial wall part toward the other axial side, the outer ring being a press-molded product; an inner ring including an inner ring raceway formed on an outer peripheral surface thereof, an inner ring small-diameter part extending toward one axial side with respect to the inner ring raceway, and an inner ring large-diameter part extending toward the other axial side with respect to the inner ring raceway; a plurality of balls rollably arranged between the outer ring raceway and the inner ring raceway, the plurality of balls being in contact with both the raceways at predetermined contact angles, and a cage configured to rollably hold the plurality of balls, wherein the folded-back part of the outer ring radially overlaps the inner ring small-diameter part with a radial gap between the folded-back part and an inner peripheral surface of the inner ring small-diameter part, characterized in that the radial gap of an inner diameter-side entry formed by an axial end of the folded-back part and the inner peripheral surface of the inner ring small-diameter part is smaller than the radial gap of an inner diameter-side exit formed by an axial end of the inner ring small-diameter part and an outer peripheral surface of the folded-back part, limiting the amount of lubricant to be supplied from the inner diameter-side entry gap to the bearing smoothly introducing the lubricant from the inner diameter-side exit gap to the inside of the bearing and controlling an oil amount of a flow of the lubricant, and that the inner ring is a rotating ring.