PROBLEM TO BE SOLVED: To provide a storage device capable of storing medical solution for a long term by preventing drying of the medical solution stored in a container made of soft synthetic resin, and a method for storing the medical solution by using the storage device.SOLUTION: The storage device includes a sealed container, at least one medical solution storage container housed in the sealed container, and a humidifying member housed in the sealed container. The humidifying member is composed of at least a bag containing water, and the bag comprises an inner layer made of synthetic resin film and an outer layer made of nonwoven fabric.COPYRIGHT: (C)2013,JPO&INPIT【課題】軟質の合成樹脂からなる容器に収容された薬液の乾燥を防いで長期間保存できる保存装置及びそれを用いた薬液の保存方法を提供する。【解決手段】保存装置は、密閉容器と、密閉容器内に収納される少なくとも1つの薬液収容容器と、密閉容器内に収納される加湿材とを備えている。加湿材は少なくとも水を内包する袋体により構成され、袋体は合成樹脂フィルムよりなる内層と不織布よりなる外層とを備えている。【選択図】図1