PROBLEM TO BE SOLVED: To provide a control device capable of suppressing temperature rise in a greenhouse due to solar radiation and a protected horticulture greenhouse having the control device.SOLUTION: A control device determines whether or not, a solar radiation amount in a greenhouse is larger than a light saturation point of a crop (step 20), and when it is determined that the solar radiation amount is larger than the light saturation point, determines whether or not, temperature in the greenhouse is higher than a lower limit value T2 of a temperature range in which a harmful effect is not applied to the crop (step 30). When it is determined that the temperature is higher than the lower limit value, the control device performs a control for closing a shading curtain for reducing the solar radiation amount (step S40).SELECTED DRAWING: Figure 3【課題】日射によるハウス内の温度上昇を抑制することのできる制御装置および制御装置を備えた施設園芸ハウスを提供する。【解決手段】制御装置は、ハウス内の日射量が作物の光飽和点よりも大きいか否かを判定する（ステップ２０）。大きいと判定した場合は、ハウス内の温度が作物に悪影響を与えない温度範囲の下限値Ｔ２より高いか否かを判定する（ステップ３０）。高いと判定された場合は、遮光カーテンを閉め日射量を小さくする制御を行う（ステップ４０）。【選択図】図３
