PROBLEM TO BE SOLVED: To provide a plant cultivation apparatus that can appropriately control various types of devices in a greenhouse corresponding to a photosynthesis state of plants.SOLUTION: There is provide a plant cultivation apparatus that cultivates crop plants by nutritious liquid in a greenhouse (H) covered by a transparent member which allows sunlight to pass, in which the greenhouse (H) comprises: a shading curtain (23) which shields sunlight passing through the transparent member； a pyranometer (26) which measures solar radiation quantity； and a photosynthesis measuring device (24) which measures the photosynthesis state of plants. When the pyranometer (26) measures solar radiation quantity of a preset quantity or more, the shading curtain (23) is controlled to be closed, and when a value showing the photosynthesis state measured by the photosynthesis measuring device (24) is smaller than a preset value (P), the shading curtain (23) is controlled to be closed at solar radiation quantity smaller than the preset quantity.SELECTED DRAWING: Figure 3【課題】 本発明は、植物の光合成の状態に応じて適切なハウス内の各種装置の制御を行える植物栽培設備を提供することを課題とする。【解決手段】 太陽光を通過させる透明性部材で覆われたハウス（Ｈ）内で養液にて作物を栽培する植物栽培設備において、ハウス（Ｈ）には、前記透明性部材を通過する太陽光を遮光する遮光カーテン（２３）と、日射量を計測する日射計（２６）と、植物の光合成の状態を測定する光合成測定装置（２４）を備え、日射計（２６）が設定量以上の日射量を測定すると遮光カーテン（２３）が閉制御する構成とし、光合成測定装置（２４）により測定される光合成の状態を示す値が設定値（Ｐ）よりも小さいと、前記設定量よりも小さい日射量で遮光カーテン（２３）を閉制御する。【選択図】 図３
