PROBLEM TO BE SOLVED: To provide a plastic greenhouse capable of maintaining temperature in the house high in the winter and low in the summer by spreading and retracting a film according to the seasons and daytime and nighttime.SOLUTION: In an agricultural plastic greenhouse, as a first film 1 that is fixedly extended on a ceiling plane of the agricultural plastic greenhouse, a material having a high permeability in the visible light region, near-infrared region, and far-infrared region is used. Different from the first film 1, a second film 2 that can be spread/retracted over/from the ceiling plane is provided, and for the second film 2, a material permeating light in the visible light region and shielding light in the near-infrared region and far-infrared region is used.SELECTED DRAWING: Figure 1
