To provide an inexpensive compact absorption-evaporation unit by integrating an evaporator and an absorber by applying a liquid film falling-type absorber capable of being easily integrated with the evaporator.

A falling liquid film-type absorber portion 2 for making an absorption solution supercooled by an air-cooled cooler absorb refrigerant vapor, and a plate-type evaporator portion 3 supplying the refrigerant vapor to the absorber portion 2 are received in a pair of casings 4, 5 in a superposed state to obtain the inexpensive compact absorption-evaporation unit.