Damper device

A damper device configured to include a plurality of rotational elements including an input element to which a torque from an engine is transmitted and an output element;

• an elastic body arranged to transmit a torque between the input element and the output element;
• and a rotary inertia mass damper with a mass body rotating in accordance with a relative rotation between a first rotational element which is one of the plurality of rotational elements and a second rotational element different from the first rotational element,
• wherein the rotary inertia mass damper includes a sun gear arranged to rotate integrally with the first rotational element, a plurality of pinion gears rotatably supported by the second rotational element, and a ring gear that meshes with the plurality of pinion gears and works as the mass body, and
• wherein the second rotational element includes a plurality of ring gear supporting portions arranged at intervals in a circumferential direction so as to restrict a movement of the ring gear in an axial direction of the damper device.