Disclosed is an air conditioner including a main body, a panel assembly configured to cover a front surface of the main body and coupled to the main body, and a cam assembly including a cam and disposed below the panel assembly, wherein the cam includes a cam contact surface formed along a rotation direction of the cam, the cam contact surface includes a first contact portion and a second contact portion formed to be in contact with the panel assembly at different heights, and the panel assembly is configured to be detachable from the main body by moving up and down with the rotation of the cam.