NOVELTY - A base material comprises base film (1), and coating layer formed in surface of base film (2). The base film consists of metal alkoxide which has reactive functional group (Y), acrylic resin component (A) which consists of reactive functional group (Y), acrylic type monomer which has reacting reactive functional group (X), and acrylic type monomer which does not have reactive functional group (X).    USE - A base material used for solar cell modules.    ADVANTAGE - The base material has gas-barrier property, weather proof property, and flexibility.    DETAILED DESCRIPTION - A base material comprises base film (1), and coating layer (2) formed in surface of base film. The base film consists of metal alkoxide which has reactive functional group (Y), acrylic resin component (A) which consists of reactive functional group (Y), acrylic type monomer which has reacting reactive functional group (X), and acrylic type monomer which does not have reactive functional group (X). The coating layer is formed by liquid containing ethylene-type resin component (B) which consists of ethylene monomer (b1), vinyl acetate monomer (b2) and monomer (b3) of carboxylic acid vinyl esters other than vinyl acetate. An INDEPENDENT CLAIM is included for a manufacturing method of base material for solar cell modules involving preparing base film which consists of metal alkoxide which has reactive functional group (Y), acrylic resin component (A) which consists of reactive functional group (Y), acrylic type monomer which has reacting reactive functional group (X) and acrylic type monomer which does not have reactive functional group (X), preparing liquid containing ethylene-type resin component B which consists of ethylene monomer (b1), vinyl acetate monomer (b2) and monomer (b3) of carboxylic acid vinyl esters other than vinyl acetate, forming coating film by coating liquid to surface of base film, and forming coating layer which hardens coating film and consists of copolymer layer. The ethylene-type resin component has carboxyl group bonded with reactive functional group (Y) of metal alkoxide.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional block diagram of base material for solar cell modules. (Drawing includes non-English language text).    Base film (1)    Coating layer (2)