The hydroponic cultivation apparatus (100) covers the light-shielding cultivation tank (80) configured to accommodate the underground part (12) of the plant (10) and the opening at the upper end of the cultivation tank (80). A light-shielding partitioning part (50) that partitions the underground space (12A) in which the underground part (12) of the plant (10) grows and the ground space (11A) in which the aboveground part (11) of the plant (10) grows. The partition part (50) is fixed in position relative to the cultivation tank (80), has a through-hole surrounding the stalk of the plant (10), and emits light to the underground part (12) of the plant (10). The fixing member (123) that keeps the closed state that suppresses the irradiation of the light source and the fixing member (123) that is movable with respect to the fixing member (123) are attached to the base member of the plant (10) ( 12) Closed state that suppresses light from being irradiated and underground part of plant (10) Door member that changes the open state capable of viewing the 12) (4), including.水耕栽培装置（１００）は、植物（１０）の地下部（１２）を収容するように構成された遮光性の栽培槽（８０）と、栽培槽（８０）の上端の開口を覆うように設けられ、植物（１０）の地下部（１２）が成長する地下空間（１２Ａ）と植物（１０）の地上部（１１）が成長する地上空間（１１Ａ）とを仕切る遮光性の仕切部（５０）と、を備え、仕切部（５０）は、栽培槽（８０）に対する位置が固定され、植物（１０）の茎を取り囲む貫通孔を有し、植物（１０）の地下部（１２）に光が照射されることを抑制する閉状態を維持する固定部材（１２３）と、固定部材（１２３）に対して移動可能な状態で固定部材（１２３）に取り付けられ、植物（１０）の地下部（１２）に光が照射されることを抑制する閉状態と植物（１０）の地下部（１２）を視認し得る開状態とに変化する扉部材（４）を、含む。
