PURPOSE: An air-conditioner is provided to reduce labors and to save a manufacturing cost by the external air opening and closing a front grille without a spring. CONSTITUTION: An air-conditioner comprises a display device indicating an operation state of the air conditioner. The display device comprises a display part(61), and first and second supporting members(65,63). The supporting members are mounted on a front frame. The second supporting member is installed on the front panel. The first retention element comprises a first base board(65a) and a first side board(65b). The first side board forwardly protrudes from both ends of the base board. The first side board comprises a push member(67). The push member has front and rear ends, and upper and lower ends. The push member is elastically transformed in inside and outside directions of the first side board.
