The air conditioner according to an embodiment of the present disclosure includes: a base panel having a first communication hole formed in one side thereof, and a second communication hole formed in another side thereof; a variable panel disposed under the base panel and changed in shape to open and close the first communication hole and the second communication hole; and a driving device disposed on an upper side of the base panel and changing a position of one side of the variable panel in an up-down direction, so that the variable panel is changed in shape, wherein the variable panel includes: a first variable panel disposed under the base panel to open and close the first communication hole; and a second variable panel disposed under the base panel to open and close the second communication hole, wherein the first variable panel and the second variable panel are coupled to be rotatable about a first rotating shaft between the first communication hole and the second communication hole.