PROBLEM TO BE SOLVED: To thaw an object to be thawed with high-heat exchange efficiency without temperature unevenness in a short time.SOLUTION: The thawing machine 100 for radiating cold from an object to be thawed using a heat storage material includes: at least one heat storage packs 102a, 102b forming a single space and including a first storage part that has a size subsuming at least one flank of the object to be thawed 106 and is filled with the heat storage material； and a pressing mechanism 104 pressing the heat storage packs 102a, 102b onto the object to be thawed 106.SELECTED DRAWING: Figure 1【課題】熱交換の効率が高く、温度ムラがなく、短時間で解凍対象物を解凍する。【解決手段】本発明の解凍機は、蓄熱材を用いて解凍対象物を放冷する解凍機１００であって、単一の空間を形成し、解凍対象物１０６の少なくとも一側面を包摂する大きさを有する第１の収容部に蓄熱材が充填された少なくとも一つの蓄熱パック１０２ａ、１０２ｂと、蓄熱パック１０２ａおよび１０２ｂを解凍対象物１０６に押圧する押圧機構１０４と、を備える。【選択図】図１
