In an exemplary embodiment, a sealing device includes a floating ring 5 in a space 4 between the outer circumference of a rotating shaft 3 and the inner circumference of a housing 2, and a multi-layered cylindrical body 10 including a plurality of elastically deformable cylindrical thin plates 11 layered on top of each other provided between an outer peripheral surface of the floating ring 5 and an inner peripheral surface of the housing. The sealing device can impart a radial restoring force against the eccentricity of the rotating shaft to restore it to its center position, and a tangential damping force to reduce the whirling of the rotating shaft.