Abstract: A centrifugal hydraulic cancel mechanism for the rotating clutch in which a first cylindrical body and a second cylindrical body whose diameter is smaller than the first cylindrical body are set on a same central axis, frictional plates are attached to an inner surface of the first cylindrical body and an outer surface of the second cylindrical body, which transmit torque with their friction, a piston is arranged to move forward and backward to the frictional plates, a fluid chamber is formed on the opposite side of the piston in respect to the frictional plates, and a cancel chamber is formed at an opposite side to the fluid chamber in respect to the piston, where oil pressure can be supplied and discharged, comprises an auxiliary oil chamber formed closer to the central axis than the cancel chamber, and a fluid passageway connecting the cancel chamber and the auxiliary oil chamber.