RECLINING DEVICE AND SEAT

Provided is a reclining device that achieves effective prevention of abnormal sound while permitting a clearance to exist between a cam and a connecting rod. A reclining device (5) includes: a pair of reclining mechanisms (6) each having an internal gear (30) and a cam (50); a connecting rod (7) coaxially coupled to the cam (50) and being rotatable together with the cam (50); and a resin bush (8) having a fit hole (8e) to receive a fitting part (7c) at a portion adjacent to each end (7b) of the connecting rod (7). The resin bush (8) is placed in a bush insertion hole (35) in contact with an inner surface of the bush insertion hole (35) of the internal gear (30) to retain the connecting rod (7) at such a position to the cam (50) that a clearance (9) exists between an inner surface (52a1) of a rod insertion hole (52a) of the cam (50) and an outer surface (7f) of the connecting rod (7).