[Problem] The present invention addresses the problem of providing a reclining device in which a pawl moves smoothly, does not slip and locks well.[Solution] A cam part that moves a pawl (33) in the direction of a locked position is configured from a rotating cam (first cam) (31) that pushes the pawl (33) in the direction of the locked position and a cam (second cam) (34) that is pressed by the rotating cam (31) and pushes the pawl (33) in the direction of the locked position while pressing same against a guide (25c). The cam part is configured so that when the pawl (33) located at the unlocked position moves to the locked position, the cam part initially presses the pawl (33) with the rotating cam (31), and when the pawl (33) is at the locked position, presses the pawl (33) with the cam (34).