To provide a vacuum thawing device capable of preventing steam from being overheated in a processing tank to evenly heat an object to be thawed at desired temperature.SOLUTION: A vacuum thawing device includes a processing tank 2 in which an object to be thawed is stored, decompression means 3 for sucking and discharging a gas in the processing tank 2 to an outside to decompress the processing tank 2, and a steam generation tank 4 provided so as to communicate with the processing tank 2 to heat storage water to thereby be capable of supplying steam to the processing tank 2； in a state where the processing tank 2 and the steam generation tank 4 are decompressed to the same pressure, the storage water in the steam generation tank 4 is heated to generate steam, and the object to be thawed in the processing tank 2 is thawed by the steam.SELECTED DRAWING: Figure 1【課題】処理槽内で蒸気が過熱されるのを防止して、所望温度でムラなく被解凍物を加熱できる真空解凍装置を提供する。【解決手段】被解凍物が収容される処理槽２と、処理槽２内の気体を外部へ吸引排出して処理槽２内を減圧する減圧手段３と、処理槽２内と連通して設けられ、貯留水が加熱されることで処理槽２内へ蒸気を供給可能な蒸気発生タンク４とを備える。処理槽２内と蒸気発生タンク４内を同等圧力に減圧した状態で、蒸気発生タンク４内の貯留水を加熱して蒸気を発生させ、その蒸気により処理槽２内の被解凍物の解凍を図る。【選択図】図１
