An object of the present invention is to provide a method for preserving pancreatic islet, a container for preserving pancreatic islet and a kit for transplanting pancreatic islet in order to effectively preserve the pancreatic islet. The present invention presents； a method for preserving a liquid including pancreatic islet in a container for preserving pancreatic islet, wherein at least a part of the container wall face consists of a film having an oxygen permeation coefficient of 2500 cm3/m2·day·atm or greater； a method for preserving a liquid including pancreatic islet in a container for preserving pancreatic islet, wherein at least a part of the container wall face consists of a film having a carbon dioxide permeation coefficient of 1000 to 20000 cm3/m2·day·atm； and a container for preserving pancreatic islet for use in the above-described method, and a kit for transplanting pancreatic islet comprising the container for preserving pancreatic islet.
