NOVELTY - The solar cell back sheet (4) comprises an electrical insulating layer, a barrier layer, an adhesive layer (13) having pencil hardness of 5B to 3H, a weatherable film layer laminated on the barrier and adhesive layers, and a polymer resin layer (11) including carbon fiber. The electrical insulating layer, barrier layer and the adhesive layer consist of polyethylene, polypropylene, polyethylene terephthalate, polyphenylenesulfide, polyethylene naphthalate, polyvinylfluoride, polyvinylidene fluoride, ethylene tetrafluorine ethylene and polychlorotrifluoroethylene.    USE - The back sheet is useful in a solar cell module (claimed).    ADVANTAGE - The back sheet has excellent heat resistance, can suppress the temperature increase of the solar cell module thus improving the thermal conductivity and photo conversion efficiency of the solar cell.    DETAILED DESCRIPTION - The solar cell back sheet (4) comprises an electrical insulating layer, a barrier layer, an adhesive layer (13) having pencil hardness of 5B to 3H, a weatherable film layer laminated on the barrier and adhesive layers, and a polymer resin layer (11) including carbon fiber. The electrical insulating layer, barrier layer and the adhesive layer consist of polyethylene, polypropylene, polyethylene terephthalate, polyphenylenesulfide, polyethylene naphthalate, polyvinylfluoride, polyvinylidene fluoride, ethylene tetrafluorine ethylene, polychlorotrifluoroethylene, ethylene chlorotrifloroethylene or inorganic compound. The carbon fiber is present in the form of rod, needle, spindle and fibrous form, and has a volume filling rate of 5-80%. The surface roughness of the polyethylene terephthalate is 0.001-3 mu m. The carbon fiber has weight average longitudinal axis of 0.1-50 mu m, and weight average dwarf axis of 0.05-5 mu m and a carbon mass rate of 90%. An INDEPENDENT CLAIM is included for a method for manufacturing the solar cell back sheet.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic cross-sectional view of a solar cell module.    back sheet (4)    Polymer resin layer (11)    Polypropylene layer (12)    Adhesive layer (13)    Polyethylene terephthalate layer. (14)