A rotary machine (100) includes a rotor (5) that rotates about an axis, a seal housing (30) that is disposed so as to face an outer peripheral surface of the rotor (5), and a seal body (10) that includes a plurality of thin plates (20) extending inward from the seal housing (30) in a radial direction and laminated in a circumferential direction. One thin plate (20) of the plurality of thin plates (20) has a shape in which the thin plate comes into contact with the other thin plates (20) provided on front and rear sides in a rotational direction in a state in which the thin plate does not come into contact with the rotor (5).