PROBLEM TO BE SOLVED: To provide a cryopreservation container that has high solubility resistance to preservation liquid and through which content can be easily observed from outside container.SOLUTION: The above-described problem can be solved by a container for freezing and preserving a cell, in which the container has an inner surface and an outer surface, the container has a single layer structure which consists of a single layer having an inner surface and an outer surface, the SP value of a main material constituting the single layer is less than the SP value of dimethylsulfoxide, or the container has a multilayer structure including an inner layer having an inner surface and an outer layer having an outer surface, the SP value of a main material constituting the inner layer is less than the SP value of dimethylsulfoxide, and the transmittance of light passing through the container is 55% or more.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】本発明は、保存液に対する高い耐溶解性能を有し、且つ容器外部から内容物を容易に観察できる凍結保存容器の提供を課題とする。【解決手段】上記課題は、細胞を凍結保存するための容器であって、容器が内表面及び外表面を有し、容器が内表面及び外表面を有する単一層からなる単層構造を有し、単一層を構成する主材料のSP値がジメチルスルホキシドのSP値未満であり、又は容器が内表面を有する内層及び外表面を有する外層を含む多層構造を有し、内層を構成する主材料のSP値がジメチルスルホキシドのSP値未満であり、且つ容器を通過する光の透過率が55%以上である容器によって解決することができる。【選択図】なし
