A producing method for a living organism-applicable hydrogen-contained fluid, which includes hydrogen molecules in living organism-applicable fluid enclosed in a container (2i) with hydrogen molecule permeability, is provided. This method includes a hydrogen exposing step of exposing hydrogen molecules to the container (2i) in which the living organism-applicable fluid is enclosed from the outside of the container without opening the container. The container with hydrogen molecule permeability is one that allows a dissolved hydrogen concentration of a normal saline solution to be 1 ppb or greater when the container filled with the normal saline solution is immersed for 5 hours in a volume of hydrogen water, which stably maintains an approximately saturated state (1.6 ppm at 20C degrees under 1 barometric pressure) and is 20 times the content volume of the container.一種含氫之生物體適用液的製造方法，係使密封於具有氫分子通透性的容器(2i)的生物體適用液含有氫分子而製造含氫之生物體適用液，具有一氫接觸步驟，係不開封該容器而從該容器的外側使氫分子接觸密封有生物體適用液的容器(2i)。具有氫分子通透性的容器，係於將裝有生理食鹽水的該容器穩定地保持在大致飽和濃度(於20℃、1大氣壓為1.6ppm)，且浸泡於該容器內容積之20倍的體積的氫溶存水中5小時的時候，該生理食鹽水的溶存氫濃度為1ppb以上的容器。
