PROBLEM TO BE SOLVED: To provide a heat insulation structure of a pipe house stretched with a thin corrugated steel plate, to be used for a greenhouse consuming less energy or a low-temperature chamber and a fixed temperature chamber, and horticulture cultivation and culturing set with an illumination such as LED and a lighting of a three-dimensional lens, or an environmental pipe house of multipurpose, set for low-temperature preservation, and a pipe house set with a cogeneration system and an agricultural trigeneration system. SOLUTION: This heat insulation structure of the pipe house comprises (1) setting a steel material such as a lip channel steel into the ground of a pipe leg part, and setting a reinforcing steel on the steel material on a leg part and an interval of a main pipe set with a structural plane, (2) setting a thin corrugated steel plate set with curving processing on a rooftop and a shoulder part, (3) setting an air fluid vent path with space on sprayed foam resin and the thin corrugated steel plate, and applying aqueous synthetic resin paint to a foam resin surface, (4) setting for top light a lighting of a polyhedral or cylindrical polygonal three-dimensional lens or a three-dimensional lens with a vacuum layer, and setting a drainage material for using rainwater, such as a suction pipe, into the ground, and (5) setting a solar cell or a fuel cell in the pipe house. COPYRIGHT: (C)2009,JPO&INPIT