Provided is a container holder in which the amount of a resin used is small. A container holder 1 is provided with a cylindrical sheet member 2 having an accommodation space for accommodating an accommodation container 20, and a film member 5 that is attached to an outer wall surface of the sheet member 2, cylindrical, and is expandable or thermally shrunk. The container holder 1 detachably locks the accommodation container 20.

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