To provide a dehumidifying air conditioner capable of accumulating latent heat energy and sensible heat energy to supply comfortable air while saving energy.

In a heat accumulating mode, water in an ice accumulating tank 1 is frozen by a freezer 4 while, in an adsorbent tank 8 accumulating an adsorbent, the adsorbent is desorbed by air heated through a radiator 5 which emits waste heat from the freezer 4. In a cooling mode, air dried through the adsorbent tank 8 is sent through a heat exchanger 3 cooled by ice in the ice accumulating tank 1 to be low-temperature dry air, which is then supplied into a room.