To enable installations for cultivating plants to be readily installed, to be operated without trouble, and to be readily removed.

This apparatus for solution cultivation has a long-size ridging container 1 having a gutter-shaped waste-fluid ditch 4 at the bottom, a cultivation bed 2 filled in the ridging container 1, water-permeable root-blocking pots 5 obtained by surrounding the root of the plants planted in the cultivation bed 2 with water-permeable root-blocking sheets, a nutritious liquid tank 10 storing the nutritious liquid to be watered on the cultivation bed 2, a pump 14 for pumping the nutritious liquid from the nutritious liquid tank 10, a watering tube 9 arranged above the cultivation bed 2 and for watering the nutritious liquid pumped by the pump 14 on the cultivation bed 2 in the water-permeable root-blocking pot 5 or the cultivation bed at the vicinity thereof, and a waste liquid pipe 15 for returning the nutritious liquid dropped from the cultivation bed 2 to the waste-fluid ditch 4 of the cultivation container 1, to the nutritious liquid tank 10.