To provide an air conditioner, achieving pleasant air conditioning for the whole room to be air-conditioned by deflecting some of an air current in the longitudinal direction of an oblong blow-out to expand the flowing range of air current to spread over the whole room to be air-conditioned.

This air conditioner includes a casing 1, the lower surface of which is opened, a heat exchanger, a blower and a drain pan 7, which are provided in the interior of the casing 1, and a decorative panel 10 having a suction opening at the center opposite to the drain pan 7 and the blow-out 10b in the periphery of the suction opening and configured to block the opening of the casing 1, wherein the drain pan 7 includes a blow-out ventilation port 7a communicating to the blow-out port 10b, and both side walls 7h in the longitudinal direction of the blow-out ventilation port 7a are provided with a deflecting part for deflecting some of air current.