To effectively reduce the torsional vibration of higher-order, and while to move a peak of the torsional vibration of low-order to the high revolution side.

A sleeve 2 is connected to the peripheral surface of a hub 1 through an elastic body 3, and fixed mass 4 are connected to the peripheral surface of the sleeve 2 with the predetermined space in the circumferential direction. A movable mass 5 is positioned between the adjacent fixed mass 4, and the movable mass 5 and the corresponding fixed mass 4 are connected by an elastic body 6. In a low revolution area of the use revolution area of an engine, the fixed mass 4 and the movable mass 5 work as the inertial mass through the elastic bodies 3, 6 so as to reduce the torsional vibration of higher- order, and in the high revolution area, the movable mass 5 is projected outward in the radial direction by the centrifugal force, and the inertia mass by the movable mass 5 is lost, and the inertial mass by the only fixed mass 4 is applied, and a peak of the torsional vibration of lower-order is moved to the high revolution side.