To provide a rolling device facilitating attachment to a housing while suppressing creep in a rotation direction of the rolling device.

This rolling device includes a pair of bearing rings relatively-rotatably arranged oppositely to each other, and a plurality of rolling elements rollably incorporated between the bearing rings, wherein one-side bearing ring is fitted to a fixed member, and the other-side bearing ring is fitted to a rotary member. In the rolling device, an O-ring comprising an elastic member is arranged on at least either of circumferential surfaces of the pair of bearing rings facing to a fitting surface of the fixed member or the rotary member along the circumferential direction, and the surface of the O-ring is coated with a hard carbon film discontinuously in the circumferential direction with respect to the fitting surface.