To make an arm of a front panel opening/closing mechanism be less represented even in operating an air conditioner, and to reduce inconvenience in maintenance.

This air conditioner includes an unit body 10 provided with an inlet 12 on a front upper section, an outlet 13 on a front lower section, and a heat exchanger 14 and a blower fan 15 in a ventilation flue connecting the inlet 12 and the outlet 13, and a front panel 20 mounted on the unit body 10 to open and close the inlet 12 by the arm 41 driven by a motor. The arm 41 is made of a transparent material, and surface embossing processing is applied at least on its upper end.