To prevent force in a radial direction from being imparted to a drive shaft of a compressor for a transporting refrigeration system.

A centrifugal clutch has a rotor assembly unit 6 connected to an engine 10, housing 4 operated by centrifugal force so as to rotate with the assembly unit and a connection adapter 20 transmitting turning force of the housing to a drive shaft of a compressor. The assembly unit, housing connection adapter and the drive shaft are coaxially arranged. The housing has a plurality of rubber bushings 16 in a radial direction receiving a drive pin 28, the bushing is inserted in a radial direction opening part in the connection adapter, to be extended in parallel to an axial line thereof. In the drive pin and the bushing, a noise and vibration in the clutch are suppressed to a minimum limit, force in a radial direction is prevented from being transmitted to the drive shaft of the compressor. In this way, drive connection between the clutch and the compressor is improved.