PROBLEM TO BE SOLVED: To provide a plant cultivation house capable of improving the production of regular vegetables and fruits by creating shade and uniforming the brightness in the interior of the house in an area inappropriate for cultivating vegetables or fruits in summer.SOLUTION: The plant cultivation house is dome-shaped on the whole with a semicircular cross-section, and the whole dome-shaped house is covered with a transparent or translucent frame-forming film. A ceiling reflection film reflecting light inward is disposed on the inner side of a ceiling portion of the dome-shaped house which is irradiated with sunlight in the daytime, and a low-position reflection film is disposed on the whole periphery on the inner side of a side wall of the dome-shaped house at a prescribed height from the ground. A cooling water circulating hose for circulating cooling water is disposed along the lower part of the side wall on the inner side of the plant cultivation house, and a heat insulating material for insulating the house from heat is interposed between the frame-forming film and the ceiling reflection film.
