Problem to be solved: to provide a waterproofing apparatus capable of suppressing the removal of a plant which is planted by the sufficient holding of a root, and to remove the plant from the inside, and to provide a hydroponic cultivation method in which a thousand roots can hardly remain inside.Solution 1Having liquid compatibilityA liquid feed part 21 capable of effecting the absorbed liquid to exudate outIt is next to the liquid feed part 21.Composed of a set of elasticities with a linear 221It has a solid network of voids of 50% toA first member 22 capable of sandwiching a root of a plant between the supply part 21 and the liquid feed partAndThe liquid feed portion 21 is disposed so as to be opposed to the first member 22.At least the portion opposed to the first member 22 isA medium body 2 having a second member 23 having a higher rigidity than that of the first member 22 andThe medium body 2 is housed andIn the same medium body 2, the casing 3 is provided with a window portion 32 in which a surface of a position to be a pinched area for holding the roots is exposed.Diagram【課題】根の充分な保持によって植栽される植物体の離脱が抑制されると共に、植物体を抜き去る際には千切れた根が内部に残存しにくい水耕栽培装置、および、水耕栽培方法を提供する。【解決手段】水耕栽培装置１は、保液性を有し、吸収した液が外部に滲出可能な給液部２１、給液部２１に隣設され、弾力性を有する線条２２１の集合により構成された、空隙率が５０％～９０％の立体網状であり、給液部２１との間で植物体の根を挟持可能な第１部材２２、および、給液部２１を間に挟んで第１部材２２と対向して配置され、少なくとも第１部材２２との対向部分が、第１部材２２よりも高剛性に構成された第２部材２３を有する培地体２と、培地体２を収容すると共に、収容された同培地体２において前記根を挟持する挟持予定領域となる箇所の表面が露出する窓部３２が形成されたケーシング３とを備える。【選択図】図２
