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.
