A damper device comprising: a first rotating body; a second rotating body coaxial with the first rotating body, and relatively rotating with respect to the first rotating body; an intermediate member coaxial with the first rotating body and the second rotating body and relatively rotating with respect to the first rotating body; and an elastic mechanism that has a first elastic body elastically coupling the first rotating body and the intermediate member with each other in a rotation direction, a second elastic body elastically coupling the intermediate member and the second rotating body with each other in the rotation direction, a pair of first sheet members supporting the first elastic body, a pair of second sheet members supporting the second elastic body, and wherein the first rotating body further has a first stopper restricting relative rotation of the second rotating body, and a second stopper (140, 140x) restricting relative rotation of the intermediate member, and characterised in that a floating elastic body is accommodated inside at least one of the first elastic body and the second elastic body (420 and in that the first rotating body has a pair of plate members (100A, 100B) and a spacer to be accommodated between the pair of plate members (100A, 100B), the second stopper is disposed in a plate member (100A, 100B), and the first stopper is disposed in the spacer. a first rotating body; a second rotating body coaxial with the first rotating body, and relatively rotating with respect to the first rotating body; an intermediate member coaxial with the first rotating body and the second rotating body and relatively rotating with respect to the first rotating body; and an elastic mechanism that has a first elastic body elastically coupling the first rotating body and the intermediate member with each other in a rotation direction, a second elastic body elastically coupling the intermediate member and the second rotating body with each other in the rotation direction, a pair of first sheet members supporting the first elastic body, a pair of second sheet members supporting the second elastic body, and wherein the first rotating body further has a first stopper restricting relative rotation of the second rotating body, and a second stopper (140, 140x) restricting relative rotation of the intermediate member, and characterised in that a first elastic body elastically coupling the first rotating body and the intermediate member with each other in a rotation direction, a second elastic body elastically coupling the intermediate member and the second rotating body with each other in the rotation direction, a pair of first sheet members supporting the first elastic body, a pair of second sheet members supporting the second elastic body, and wherein the first rotating body further has a first stopper restricting relative rotation of the second rotating body, and a second stopper (140, 140x) restricting relative rotation of the intermediate member, and characterised in that a floating elastic body is accommodated inside at least one of the first elastic body and the second elastic body (420 and in that the first rotating body has a pair of plate members (100A, 100B) and a spacer to be accommodated between the pair of plate members (100A, 100B), the second stopper is disposed in a plate member (100A, 100B), and the first stopper is disposed in the spacer.