PROBLEM TO BE SOLVED: To provide a plant holder for hydroponic cultivation, which can be used for hydroponic cultivation, the plant holder being capable of increasing the interval between seedlings with the growth of the seedlings and fixing the seedlings so as to prevent the interval between the seedlings from varying.SOLUTION: According to the present invention, a plant holder for hydroponic cultivation comprises: a plurality of seedling-holding members 10, 11 provided with a plurality of seedling-holding portions 20 and an interval-holding member 12 for holding the interval between the seedling holding members 20. The seedling-holding members 10, 11 are formed in a planar shape with an uneven portion on at least one side thereof. The seedling-holding portions 20 are formed on convex portions 18 of the seedling-holding members 10, 11. They take a usage form for immature seedlings in which convex portions of the seedling holding members 10, 11 are disposed in the concave portions of the other seedling holding members 10, 11, respectively, or a usage form for mature seedlings in which the interval-holding member is placed between the seedling-holding members to arrange the seedling-holding members in a state where the interval between the seedling holding members is increased.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】水耕栽培する際に使用される水耕栽培用植物保持具に関するものであり、苗の発育に応じて苗の間隔を広げることができ、且つ苗の間隔が変わらないように固定することができる水耕栽培用植物保持具を開発する。【解決手段】複数の苗保持部20が設けられた複数の苗保持部材10,11と、苗保持部材20の間隔を保持する間隔保持部材12によって構成されている。苗保持部材10,11の平面形状は少なくとも一辺に凹凸形状を有するものであり、苗保持部材10,11の凸状部分18に苗保持部20が形成されている。苗保持部材10,11の凹状部分に他の苗保持部材10,11の凸状部分を配置する幼苗時使用形態と、苗保持部材同士の間に間隔保持部材を入れて苗保持部材同士の間隔を広げた状態で配置する成苗時使用形態とをとることが可能である。【選択図】図2