TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Layer: The adhesive layer is laminated on both surface of flame resistant layer. Preferred Compounds: The flame retardant is a white compound which contains halogen, phosphoric acid ester and intumescent group.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The adhesive resin is a silane modified resin. The silane modified resin is a graft copolymer formed by graft polymerizing ethylenic unsaturated silane compound and polyethylene. The thermoplastic resin is in non-silane modified resin. The thermoplastic resin and adhesive resin are resin of same kind. Preferably thermoplastic resin is silane modified resin. Preferred Device: A solar cell module has transparent front substrate, front filler layer and back surface filler layer. The filler layers contain filler. A solar cell element is clamped on filler layer. EXAMPLE - Hindered amine light stabilizer (in wt.pts) (5), phosphorus type heat stabilizing agent (0.5), and Ziegler linear low density polyethylene (100) having density of 0.92 g/cm3, were mixed and melted to obtain weather resistance masterbatch. Then, metallocene linear low density polyethylene (80) having density of 0.905 g/cm3, obtained weather resistance masterbatch (5) and antimony trioxide (20) were mixed and extruded at 230degrees C to obtain flame resistant layer having thickness of 533 microns. Benzophenol type ultraviolet absorber (3.8), hindered amine light stabilizer (5), phosphorus type heat stabilizing agent (0.5), Ziegler linear low density polyethylene (100) having density of 0.92 g/cm3, were mixed and melted to obtain weather resistance masterbatch. Then, silane modified resin (20), metallocene linear low density polyethylene (80) having density of 0.905 g/cm3 and obtained weather resistance masterbatch (5) were mixed and extruded at 230degrees C to obtain adhesive layer having thickness of 67 microns. The obtained adhesive layer and flame resistant layer were laminated to obtain filler. The obtained filler had reflectance of 72%, excellent fire safety based on JIS specification K7247 and photovoltaic output of 98% based on JIS specification C8917. The solar cell module was formed using the obtained filler. The obtained solar cell module had excellent peeling strength based on JIS Z1707 and excellent fire safety.