DAMPER DEVICE

To provide a damper device capable of suppressing damages to the clamping protrusion of the resin spring seat and generation of attachment abnormalities in the attaching portion of the rotating body. The damper device comprising a second spring seat (42) that supports the two ends of a first coil spring (31) and a second coil spring (32), which are interposed in the circumferential direction between a hub plate (1) and an input-output plate (2), wherein the second spring seat (42) comprises a pair of clamping protrusions (46, 46) which are protruded from a seat portion (43) having a spring seating surface (43a) so as to be able to clamp an attaching portion (24b) of an intermediate plate-side support arm (24), and the clamping protrusion (46) is configured so that the device outer diameter direction side of the spring central axis (Sc) is a low-rigidity portion (46a) with a relatively lower rigidity, while the device inner diameter direction side of the spring central axis (Sc) is a high-rigidity portion (46b) with a relatively higher rigidity.