To realize cost reduction of a humidity control device (1) using a humidity control element (11) containing an adsorbent by enabling low temperature regeneration and furthermore suppressing a heating quantity of regeneration air.

Allophane or imogolite is used as the adsorbent of the humidity control element (11), and the low temperature generation is performed by regenerating the humidity control element (11) by using only a moisture-adsorbing and releasing stage of low temperature side by using a multi-stage moisture- adsorbing and releasing properties of allophane and imogolite.