The present invention makes it possible to freeze articles more quickly and at a lower temperature. A freezer in which a cooling medium for soaking and freezing an article is accumulated in a container to conduct cooling, the cooling medium being used in a liquid form, the freezer including: a vibrator that is driven by electricity supplied via an electrical cable, the vibrator coming into contact with the side of the container contacting the cooling medium and causing the container to vibrate; a tube that accommodates the vibrator and the electrical cable such that a portion of the vibrator in contact with the container is exposed, the tube having a greater length than the longitudinal-direction length of the vibrator, and having a lesser depth than that of the container; and a rubber elastic body holding material with which the interior of the tube is filled, the holding material performing sealing...

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