A coupling which may include a driving side member, a driven side member, and an intermediate member interposed between the driving side member and the driven side member. The intermediate member may be configured to transmit a driving force from the driving side member to the driven side member. The driven side member may include a first driven side rotating body having a first engaging portion and a second driven side rotating body having a second engaging portion. Further, the second driven side rotating body may be configured to rotate relative to the first driven side rotating body about a common axis of rotation with the first driven side rotating body. Additionally, the second engaging portion may be disposed outside of the first engaging portion with respect to a radial direction of the first driven side rotating body.