NOVELTY - The building has a multilayered structure that is formed by a roof (1) arranging the panels (11,12) positioned to an outdoor side and under panel (11) through an air layer respectively. The panels (11,12) are configured to provide the water resistant layers (16,19) in the upper surfaces of the surface substrates (14,17) so as to water proof the surfaces respectively. The panel (11) is provided to arrange a roof material (10) on water resistant layer (16). The panel (11) is made to penetrate a penetration material (4), and a solar cell panel (2) is fixed on roof.    USE - Building with solar cell.    ADVANTAGE - The second panel with water proofing surface is positioned to the room inner side of air layer so as to prevent the rain water from penetrating into the air layer penetrating indoors by the proofed second panel water even when the rain water passing first panel penetrates into air layer so that the penetration of rain water to the room interior is prevented by the waterproof structured second panel even when rain water passes first panel by penetration material. Thus, the amounts of storm sewage passing first panel and penetrating into the air layer by penetration material is reduced. Hence, the leakage of rainwater from building is prevented reliably over a long period of time of reliably fixing the solar cell panel to roof through the penetration material to penetrate roof. The fixing tool is fixed to the surface of first panel through the penetration material to fix the solar cell panel to the roof of building. Thus, the solar cell panel is fixed to roof simply, easily, and firmly at the normal position of roof. Since the roof is used as thermal radiation plate formed by molding the roof material into waveform, the solar cell panel is efficiently cooled in cooling clearance gap by the external air to perform free convection, and the characteristics to lessen decline in generating efficiency by temperature rise of solar cell panel. Thus, the manufacturing cost of solar cell panel is reduced by combining roof material to heat sink.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the building. (Drawing includes non-English language text)    Roof (1)    Solar cell panel (2)    Penetration material (4)    Roof material (10)    Panels (11,12)    Surface substrates (14,17)    Water resistant layers (16,19)