PROBLEM TO BE SOLVED: To ensure that an interior space (201) of a storage building (200) such as a container and a warehouse can be sufficiently humidified without water supply.SOLUTION: A humidifying device cools air in an air path (220) for supplying the air to the interior space (201), extracts it in a water extraction part (250), stores extracted water in a humidifying part (260), and humidifies the interior space. The air path (220) is provided with main paths (221, 222, and 263) communicating with the interior space (201), and a discharge path (223) for partially or wholly discharging air for water extraction to the outside of the object space (201).SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】コンテナや倉庫などの貯蔵庫(200)の庫内(201)を無給水で十分に加湿できるようにする。【解決手段】空気を庫内(201)へ供給する空気経路(220)でその空気を冷却して水分取り出し部(250)で取り出し、取り出した水を加湿部(260)に溜めて庫内を加湿する加湿装置において、空気経路(220)に、庫内(201)へ連通する主経路(221,222,263)と、水分取り出し用空気の一部又は全部を上記対象空間(201)の外へ排出する排出経路(223)を設ける。【選択図】図1