The present invention provides a hydroponic cultivation tool in which hydroponic cultivation objects such as plant seeds and bulbs can be kept immersed in the nutrient solution without replenishing the nutrient solution. A hydroponics tool 100 includes a buoyancy body 10 floating in a nutrient solution, and an annular hollow tube or a solid member is used as the buoyancy body. You may provide the object receiving part which receives the target of hydroponics in the hole 20 of a buoyancy body. The buoyancy body can be formed by a solid member that can pierce a skewer-shaped shaft. [Selection] Figure 1【課題】養液を補給しなくても、植物の種子や球根などの水耕栽培の対象物が養液に浸かったまま保たれる水耕栽培用具を提供する。【解決手段】水耕栽培用具１００は、養液に浮かぶ浮力体１０からなり、浮力体には、環状の中空チューブや中実部材を使用する。浮力体の孔部２０に、水耕栽培の対象物を受け止める対象物受部を設けてもよい。浮力体は、串状の軸体を突き刺し可能な中実部材によって形成することが可能である。【選択図】図１
