Cultivation greenhouse

A cultivation greenhouse comprising:

• an inner lining that forms a housing space for housing a plant to be a cultivation target, the inner lining tightly sealing the housing space;
• an outer lining that is disposed on an outer side of the inner lining to house the inner lining, the outer lining forming, with the inner lining, a circulation space for flowing outside air;
• a circulation device that circulates air outside the outer lining into the circulation space and discharges the air to outside of the outer lining;
• two light-shielding sheets disposed one above another between the inner lining and the outer lining, each light-shielding sheet decreasing an intensity of solar radiation incident on the housing space by covering at least part of the inner lining;
• and
• a light-shielding control unit that switches a light-shielding state of each light-shielding sheet between a covered state of covering at least part of a ceiling part of the inner lining or a ceiling part of the outer lining and an open state of not covering the ceiling part of the inner lining or the ceiling part of the outer lining,
• wherein
• the inner lining and the outer lining are provided such that the circulation space is formed between a ceiling part of the inner lining and a ceiling part of the outer lining, and
• the light-shielding control unit sets target values as an upper limit value and a lower limit value of the intensity of solar radiation based on a target yield of the plant, and controls the light-shielding state of each light-shielding sheet so that the intensity of solar radiation is equal to or lower than the upper limit value and equal to or higher than the lower limit value.