PROBLEM TO BE SOLVED: To provide a cryopreservation jig capable of performing freezing work easily and surely. A cell having a main body member having at least a mounting portion for mounting cells or tissues and a gripping portion attached to the mounting portion, and an encapsulating member for encapsulating the mounting portion of the main body member. Alternatively, in a jig for vitrification and cryopreservation of tissue, the gripping part has a taper structure part for fixing the encapsulating member, and the opening part to be inserted into the main body member of the encapsulating member is tapered. The structure has no structure, the inner diameter of the opening is smaller than the maximum diameter of the tapered structure portion of the main body member, and the encapsulating member is a member formed of a crystalline polymer compound. A jig for vitrification and cryopreservation of cells or tissues. [Selection diagram] Figure 1【課題】凍結作業を容易かつ確実に行うことができる凍結保存用治具を提供する。【解決手段】細胞又は組織を載置する載置部および該載置部に付設された把持部を少なくとも有する本体部材と、該本体部材の載置部を被包する被包部材とを有する細胞又は組織のガラス化凍結保存用治具であって、前記した把持部は該被包部材を固定するためのテーパー構造部を有し、前記した被包部材の本体部材へ挿入する開口部はテーパー構造を有さず、該開口部の内径は前記した本体部材が有するテーパー構造部の最大径よりも小さく、更に該被包部材が結晶性高分子化合物により形成された部材であることを特徴とする、細胞又は組織のガラス化凍結保存用治具。【選択図】図１
