An adsorption heat pump includes: an evaporator configured to evaporate a refrigerant; and an adsorbent heat exchanger provided with an adsorption member configured to adsorb vapor evaporated by the evaporator, and a heat transfer tube in which a heating medium flows. Here, the adsorbent heat exchanger includes a pressing mechanism configured to press and compress the adsorption member depending on a temperature of the heating medium flowing inside the heat transfer tube.