Abstract: An air conditioner including an air intake vent, an air blow-off vent for blowing off air which has been heat-exchanged, air-flow direction changing blades which are disposed at the air blow-off vent and serves to change the air-flow (blow-off air) direction, an opening portion through the outside air is supplied from the outside into a room, a closing member (damper) for selectively closing the opening portion, and an open/close operation member which is disposed in a gap between the air-flow direction changing blades and allows the closing member to selectively open or close the opening portion. When the outside air is supplied through the opening portion into the room, a finger is inserted into the gap to move the open/close operation member in a direction along the gap, whereby an outside air work can be simply performed without detaching the front panel from the air conditioner.