PROBLEM TO BE SOLVED: To provide a hydrogen generation unit that is capable of setting a hydrogen reaction temperature and a reaction space between a hydrogen generating agent and reaction water to optimal conditions and executing control so as to generate hydrogen with a uniform concentration.SOLUTION: This hydrogen generation unit is structured by simply combining a "housing bag of a hydrogen generating agent capable of blocking metal ions" and a "bag-housing cylindrical capsule", which is enabled by being made capable of setting a hydrogen reaction temperature and a reaction space between the hydrogen generating agent and reaction water to optimal conditions and executing control so as to generate hydrogen with a uniform concentration through configuration where a hydrogen generating agent-housing unwoven cloth bag on which the metal ions can be adsorbed is housed in the cylindrical capsule with one end open, and the capsule is thrown into a PET bottle to cause reaction of water in the PET bottle as the reaction water.SELECTED DRAWING: Figure 2【課題】水素発生剤と反応水との水素反応温度と反応空間を最適な条件に設定することができ均一な水素濃度の発生に制御できる水素発生ユニットを提供する。【解決手段】金属イオンが吸着可能な水素発生剤収納の不織布袋を一端開放の筒状カプセルに収容してそのままペットボトル中にカプセルごと投入してペットボトル内の水を反応水として袋内で反応させる構成とすることにより、水素発生剤と反応水との水素反応温度と反応空間を最適な条件に設定することができ均一な水素濃度の発生に制御できるようにして、水素発生ユニットの構成を「金属イオンブロック可能な水素発生剤の収納袋」と「袋収容の筒型カプセル」という簡便な組み合わせ構造とした。【選択図】図2