SEAT ROTATING DEVICE

A seat rotating device includes a base plate, a rotating plate, a coupling unit, and a drive unit. The coupling unit includes a link, a guide having a linearly extending shape, and a moving body that is movable along the guide and supports the rotating plate. The drive unit can move the moving body along the guide. The link includes a fixing end and a rotating end. The guide has a shape extending linearly along a diameter of a virtual circle, the virtual circle having length twice the distance between the fixing end and the rotating end as its radius, and having the fixing end as its center. The moving body moves the rotating plate along the guide while relatively rotating the rotating plate with respect to the moving body.