Power Transmission Device

A power transmission device has a first clutch member coupled to an output member . A second clutch member has a plurality of driven-side clutch plates . A back-torque transmitting cam presses the drive-side clutch plates and the driven-side clutch plates against each other by moving the second clutch member when a rotational force is input to the first clutch member . A cushioning member is interposed between the first clutch member and the second clutch member . The cushioning member , by being compressed, applies an urging force while allowing movements of an interlocking member and a pressure member in a process where the interlocking member moves and the pressure member moves from the inactive position toward the active position.