The thawing machine includes a metal member that supports the pallet on which the frozen product is placed, a power source that applies an AC voltage to the metal member so that a predetermined weak current (1 μA or more and 1000 mA or less) flows through the frozen product, A cover having air permeability and conductivity, and an AC voltage is also applied to the cover in the thawing of the frozen product.解凍機は、冷凍品が載置されたパレットを支持する金属部材と、所定の微弱電流（１μＡ以上、１０００ｍＡ以下）が冷凍品に流れるように、金属部材に交流電圧を印加する電源と、冷凍品を覆い、通気性および導電性を有する覆い体と、を備え、冷凍品の解凍において、交流電圧が覆い体にも印加されている。
