The present invention provides a hydrogenation device capable of determining a degree of consumption of a hydrogen-permeable membrane with a simple and inexpensive configuration, and a method for determining a degree of consumption of a hydrogen-permeable membrane. The hydrogenation device (1) includes: a first chamber (31) to which hydrogen-dissolved water is supplied； a second chamber (32) to which raw water is supplied； a hydrogen-permeable membrane (33) configured to move hydrogen dissolved in the hydrogenated water from the first chamber (31) to the second chamber (32), so that hydrogenated water is generated in the second chamber (32)； a hydrogen concentration sensor (21) for detecting a hydrogen concentration of the hydrogenated water from the second chamber (32)； and a control part configured to determine the degree of consumption of the hydrogen-permeable membrane (33) at least based on hydrogen concentration of the hydrogenated water.本發明提供能以簡單且廉價的構成來準確地判定氫透過膜的消耗度的加氫裝置以及氫透過膜的消耗度判定方法。加氫裝置（1）具備：第一室（31），被供給溶氫水；第二室（32），被供給原水；氫透過膜（33），為了在第二室（32）中生成加氫水，使溶入於加氫水的氫從第一室（31）向第二室（32）移動；氫濃度傳感器（21），檢測從第二室（32）取出的加氫水的溶氫濃度；以及控制部，至少根據加氫水的溶氫濃度來判定氫透過膜（33）的消耗度。
