An air conditioner includes a main body, a blower fan disposed in the main body, a discharge panel including a main outlet configured to discharge air discharged from the blower fan and a plurality of fine outlets provided near the main outlet, an opening and closing member configured to move in forward and backward directions and open and close the main outlet, and a lighting apparatus disposed on a back surface of the opening and closing member and configured to emit light to a back side thereof. Since an area illuminated by the lighting apparatus is changed according to a position of the opening and closing member, a user intuitively identifies an operational state of the air conditioner.