Abstract: A moisture-harvesting device capable of harvesting moisture, which can be also used as drinking water or the like, from atmospheric air. The moisture-harvesting device includes: an atmospheric-air introduction unit; an atmospheric moisture converter that is provided with a mechanism for reducing a pressure of atmospheric air introduced by the atmospheric-air introduction unit and is equipped with a cooling section for cooling the introduced atmospheric air and extracting a moisture content; a water intake cock, that extracts water obtained by the atmospheric moisture converter; and a filter unit that has first to fifth fitters and is provided at an upstream side from the water intake cock, and removes foreign matter from the water obtained by the atmospheric moisture converter, whereby it is possible to harvest the moisture, which can be also used as the drinking water or the like, from the atmospheric air.