Provided is a hydrogen gas generating body capable of generating a hydrogen-added liquid in a shorter time than with conventional hydrogen-adding apparatuses. This hydrogen gas generating body is constituted by a hydrogen generating composition that generates hydrogen by retaining water, and a housing body formed to freely house the hydrogen generating composition by having a hydrogen gas permeable film overlaying a backing comprising a pouched non-woven fabric. The invention is also characterized in that: the housing body has the hydrogen gas permeable film overlaid on the inner side of the backing； the housing body has the hydrogen gas permeable film overlaid on the outer side of the backing； or the housing body comprises two layers of the backing with the hydrogen gas permeable film overlaid therebetween.
