NOVELTY - A back surface protection sheet (A) is obtained by carrying out lamination integration of sealing layer (4) on one surface of lamination sheet (B) obtained by carrying out lamination integration of a vapor deposition film (2) made of inorganic oxide film, and a weather-resistant base material (3) on one surface of weather-resistant base material (1). The sealing layer contains (in parts mass) modified polyolefin-type resin (100) and silane compound (I) (0.001-20).    USE - Back surface protection sheet is used for solar cell module (claimed).    ADVANTAGE - The back surface protection sheet has excellent flexibility, heat resistance and adhesiveness. The solar cell module is efficiently and stably manufactured for long period of time. The generation of gas during manufacture of solar cell module is suppressed.    DETAILED DESCRIPTION - A back surface protection sheet (A) is obtained by carrying out lamination integration of sealing layer (4) on one surface of lamination sheet (B) obtained by carrying out lamination integration of a vapor deposition film (2) made of inorganic oxide film, and a weather-resistant base material (3) on one surface of weather-resistant base material (1). The sealing layer contains (in parts mass) modified polyolefin-type resin (100) and silane compound (0.001-20) of formula: R1Si(OR2)3 (I).    R1=non-hydrolyzable and polymerizable functional group;and    R2=1-5C alkyl.    An INDEPENDENT CLAIM is included for solar cell module, which is obtained by carrying out laminated integration of back surface protection sheet in a state at which sealing layer opposes solar cell element, at one surface of transparent substrate in which solar cell element is formed in thin-film form on one surface of transparent substrate.    DESCRIPTION OF DRAWING(S) - The drawing shows the longitudinal cross-sectional view of back surface protection sheet.    Weather-resistant base materials (1,3)    Vapor deposition film (2)    Sealing layer (4)    Back surface protection sheet (A)    Lamination sheet (B)