TECHNOLOGY FOCUS - POLYMERS - Preferred Components: Alternately, the solar cell sheet has a multilayered structure comprising polyphenylene ether resin layer in both outer layers. The solar cell sheet has layer (I) consisting of resin composition having polyphenylene ether as main component and a gas barrier property layer (II) having water vapor permeation rate of less than 10 g/m2.24 hours according to JIS K7129. Alternately the solar cell sheet has layers (I,II) and light shielding coloring layer (III). A sealing resin layer (12A) and a base material layer having polyphenylene ether resin layer are laminated and heat processed at 150 degrees C for 30 minutes in dry air flow, and dimensional change rate of base material layer is measured as 3% or less. The solar cell sheet contains a phosphorus group flame retarding agent. The sealing resin layer contains polyolefin-type resin or ethylene-vinyl acetate type resin, and a radical generating agent or silane coupling agent. A junction box (18) is adhered on one surface of solar cell sheet. The gas barrier layer is a metal thin film layer (a), an inorganic thin film layer (b), a resin layer (c) containing cyclic olefin, high density polyethylene, polypropylene, polyvinylidene chloride, polytetrafluoroethylene and polychlorotrifluoroethylene resin, a resin layer (d) containing inorganic particles, and coating layer (e) having polyvinylidene fluoride, polyvinyl alcohol, acrylic resin and epoxy resin. The light shielding coloring layer has light shielding white film or light shielding black film. The gas barrier property layer has a weather-proof coating layer and inorganic thin film layer. The weather-proof coating layer contains crosslinked material of polycaprolactone polyol and/or polycarbonate polyol, crosslinked material of modified polyvinyl alcohol, and acrylic-type copolymer having ultraviolet ray stability group, ultraviolet ray absorptive group and/or cycloalkyl group. Preferred Properties: The thickness of solar cell sheet is more than that of polyphenylene ether resin layer by 50%. The peeling strength of interlayer of sealing resin layer and base material layer is 10 N/15 mm or more.