<p>A humidity control device has a filter status detection means (63) for detecting the status of clogging of filter members (27, 28) based on a detection value of a suction air humidity detection means (65) and a detection value of a supply air humidity detection means (66). The suction air humidity detection means (65) and the supply air humidity detection means (66) are used to control operating conditions of the humidity control device (10), and are also used to detect the status of clogging of the filter members (27, 28).</p>
