A water retention container for supplying steam is provided. A bag-shaped water supply container for steam supply 10 in which two plastic resin films each having a substantially rectangular shape are overlapped, three sides are sealed, and the other one is opened as an opening 1. A non-woven fabric 2 having moisture permeability, water resistance and bacterial barrier properties is disposed at the center of at least one of the plastic resin films, and a plurality of suspension insertion holes 3 are provided in the opening. A water supply container for steam supply, characterized in that a re-sealable opening / closing chuck 4 is provided at an opening closer to the center than the insertion hole so that water can be retained therein, Later, the sealed chuck is opened, and the used culture equipment and culture solution are placed inside and the chuck is resealed to prevent cross-contamination in the cell preparation facility (CPC) and autoclave sterilization is also possible. Become[Selection] Figure 3【課題】蒸気供給用保水容器を提供する。【解決手段】略矩形状のプラスチック樹脂フィルムを２枚重ね合わせて、これらの周囲のうち三方を封着して、残り一方を開口部１として開口自在とした袋状の蒸気供給用保水容器１０であって、前記プラスチック樹脂フィルムの少なくとも１枚の中央部には透湿性及び耐水性とバクテリアバリア性を備えた不織布２を配し、前記開口部には複数の吊下用挿通孔３を備え、該挿通孔よりも中央部寄りの開口部に再封止可能な開閉チャック４を設けて、内部に水を保水可能としたこと、を特徴とした蒸気供給用保水容器であって、蒸気供給後に封止したチャックを開け、さらに内部に使用済の培養器具や培養液を入れチャックを再封止することで、細胞調製施設（ＣＰＣ）内における交叉汚染をも防止し、かつオートクレーブ滅菌も可能となる。【選択図】図３
