A damper device comprising: a pressing plate; a rotation plate which is disposed to oppose the pressing plate; an elastic member which elastically links the pressing plate and the rotation plate in a circumferential direction, and in which bending is generated in a case where relative twist of the pressing plate and the rotation plate is generated; and a pair of seats (21, 22) which is provided on both end surfaces in the circumferential direction of the elastic member, wherein each of the seats (21, 22) has a projected surface which protrudes in the circumferential direction on the pressing plate side, wherein the pressing plate has a recessed surface that corresponds to the projected surface, wherein an outer diameter side part of the projected surface of each of the seats (21, 22) and an outer diameter side part of the recessed surface of the pressing plate come into surface-contact with each other in a case where the relative twist is not generated, wherein the outer diameter side part of the projected surface of one seat and the outer diameter side part of the recessed surface of the pressing plate come into surface-contact with each other, and a void is formed between the outer diameter side part of the projected surface of the other seat and the outer diameter side part of the recessed surface of the pressing plate, in a case where the relative twist is generated, and wherein the void increases as an angle of the relative twist increases, characterized in that the outer diameter side part of the projected surface of each of the seats and the outer diameter side part of the recessed surface of the pressing plate are respectively formed as a curved surface along an arc, and the center of the arc is offset to the seat side with respect to the rotation center of the pressing plate. a pressing plate; a rotation plate which is disposed to oppose the pressing plate; an elastic member which elastically links the pressing plate and the rotation plate in a circumferential direction, and in which bending is generated in a case where relative twist of the pressing plate and the rotation plate is generated; and a pair of seats (21, 22) which is provided on both end surfaces in the circumferential direction of the elastic member, wherein each of the seats (21, 22) has a projected surface which protrudes in the circumferential direction on the pressing plate side, wherein the pressing plate has a recessed surface that corresponds to the projected surface, wherein an outer diameter side part of the projected surface of each of the seats (21, 22) and an outer diameter side part of the recessed surface of the pressing plate come into surface-contact with each other in a case where the relative twist is not generated, wherein the outer diameter side part of the projected surface of one seat and the outer diameter side part of the recessed surface of the pressing plate come into surface-contact with each other, and a void is formed between the outer diameter side part of the projected surface of the other seat and the outer diameter side part of the recessed surface of the pressing plate, in a case where the relative twist is generated, and wherein the void increases as an angle of the relative twist increases, characterized in that the outer diameter side part of the projected surface of each of the seats and the outer diameter side part of the recessed surface of the pressing plate are respectively formed as a curved surface along an arc, and the center of the arc is offset to the seat side with respect to the rotation center of the pressing plate.