Abstract: A ceiling-mounted air conditioner is provided. The ceiling-mounted air conditioner includes an intake panel, which has an air intake, a door panel, which can be lifted up to and down from the intake panel, and a plurality of elevation driving units, which are disposed on the intake panel and apply driving force to the door panel so as for the door panel to be lifted up and down and thus to open or shut the air intake of the intake panel. Therefore, it is possible to improve the exterior appearance of the ceiling-mounted air conditioner and facilitate the design of the ceiling-mounted air conditioner.