A plant hydroponic cultivation device is achieved with which the absorption of liquid by the plants and the absorption of air vaporized from the liquid can be performed more uniformly, in accordance with the type of liquid supplied to plants being cultivated. A plant hydroponic cultivation device 100 comprising: a storage container 101 for accumulating liquid； a first liquid supply mechanism M1 that provides a first liquid to the storage container 101 at a first liquid level； and a second liquid supply mechanism M2 that provides a second liquid to the storage container 101 at a second liquid level.本發明獲得一種能夠相應於向栽培之植物提供之液體之種類而更均一地進行植物對液體之吸收及對自液體蒸發之氣體之吸收的植物水耕栽培裝置。 本發明之植物水耕栽培裝置100中具備：儲存容器101，其用於積存液體；第1液體供給機構M1，其以第1水位將第1液體向前述儲存容器101提供；及第2液體供給機構M2，其以第2水位將第2液體向前述儲存容器101提供。
