A centrifugal clutch comprising: a drive plate to be rotatably driven together with a driven pulley in response to drive force of an engine; a clutch outer having, outside the drive plate, a cylindrical surface provided concentrically with the drive plate; a clutch weight having a clutch shoe formed to extend along a circumferential direction of the drive plate and facing the cylindrical surface of the clutch outer, one end side of the clutch weight in the circumferential direction being turnably attached onto the drive plate through a swing support pin and a pin slide hole, the other end side displacing toward a cylindrical surface side of the clutch outer; a protruding body provided to protrude toward the clutch weight from the drive plate; a driven portion provided at the clutch weight and configured to climb on the protruding body upon displacement of the other end side of the clutch weight; and a pivot-point-side slide member (215, 250) provided between the swing support pin and the pin slide hole to slide the swing support pin and the pin slide hole, wherein the swing support pin is provided at one of the drive plate or the clutch weight, and is formed to extend toward the other one of the drive plate or the clutch weight, characterized in that the pin slide hole is provided at the other one of the drive plate or the clutch weight and is formed in a long hole shape allowing backward displacement of one end side of the clutch weight in a rotary drive direction of the drive plate, and the swing support pin is slidably displaceably fitted in the pin slide hole through the pivot-point-side slide member (215, 250), wherein the pin slide hole is formed as a long hole with such a length that collision with the swing support pin is avoided even in a case where one end side of the clutch weight displaces backward in the rotary drive direction of the drive plate. a drive plate to be rotatably driven together with a driven pulley in response to drive force of an engine; a clutch outer having, outside the drive plate, a cylindrical surface provided concentrically with the drive plate; a clutch weight having a clutch shoe formed to extend along a circumferential direction of the drive plate and facing the cylindrical surface of the clutch outer, one end side of the clutch weight in the circumferential direction being turnably attached onto the drive plate through a swing support pin and a pin slide hole, the other end side displacing toward a cylindrical surface side of the clutch outer; a protruding body provided to protrude toward the clutch weight from the drive plate; a driven portion provided at the clutch weight and configured to climb on the protruding body upon displacement of the other end side of the clutch weight; and a pivot-point-side slide member (215, 250) provided between the swing support pin and the pin slide hole to slide the swing support pin and the pin slide hole, wherein the swing support pin is provided at one of the drive plate or the clutch weight, and is formed to extend toward the other one of the drive plate or the clutch weight, characterized in that the pin slide hole is provided at the other one of the drive plate or the clutch weight and is formed in a long hole shape allowing backward displacement of one end side of the clutch weight in a rotary drive direction of the drive plate, and the swing support pin is slidably displaceably fitted in the pin slide hole through the pivot-point-side slide member (215, 250), wherein the pin slide hole is formed as a long hole with such a length that collision with the swing support pin is avoided even in a case where one end side of the clutch weight displaces backward in the rotary drive direction of the drive plate.