To provide a thawing device and a thawing method which, when thawing a frozen matter of biological-origin contained in a container, is capable of preventing the content from being heated excessively.SOLUTION: A thawing device 10 comprises: a placing part for placing a freezing bag 15 such that the thickness direction of the freezing bag 15 being a container 12 containing a frozen matter of biological origin 14 is along a vertical direction； a warming mechanism 22 which warms the frozen matter of biological origin 14 contained in the container 12； a measuring unit 24 which measures thickness-related information with respect to plural places of the freezing bag 15； and an estimation unit 40 for estimating the thawing state of the frozen matter of biological origin 14 contained in the container 12 on the basis of a result of the measurement by the measuring unit 24.SELECTED DRAWING: Figure 2【課題】容器内の生体由来凍結物を融解する際に、内容物に対する過加熱を防止することが可能な融解装置及び融解方法を提供する。【解決手段】融解装置１０は、生体由来凍結物１４が収容された容器１２である凍結バッグ１５の厚み方向が上下方向に沿うように凍結バッグ１５を載せるための載置部と、容器１２内の生体由来凍結物１４を加温する加温機構２２と、凍結バッグ１５の複数個所について厚みに関連した情報を測定する測定部２４と、測定部２４の測定結果に基づいて容器１２内の生体由来凍結物１４の融解状態を推定する推定部４０と、を備える。【選択図】図２
