NOVELTY - A back surface protection sheet has adhesion-enhancing layer (62) arranged in a base material layer (61). The adhesion-enhancing layer is a multilayered structure having core layer (621) containing polypropylene resin, and surface layer (622) exposed to an outermost layer of a back surface protection sheet. The surface layer contains polypropylene resin containing 1.9-3 %mass ethylene units. The back surface protection sheet has sealing material adhesion strength of 30-70 N/15mm, measured by the predetermined adhesion test.    USE - Back surface protection sheet is used for solar cell module (claimed).    ADVANTAGE - The back surface protection sheet has excellent adhesiveness and handleability. The solar cell module having excellent rework property, is obtained by the back surface protection sheet with high productivity.    DETAILED DESCRIPTION - A back surface protection sheet has adhesion-enhancing layer arranged in a base material layer. The adhesion-enhancing layer is a multilayered structure having core layer containing polypropylene resin, and surface layer exposed to an outermost layer of a back surface protection sheet. The surface layer contains polypropylene resin containing 1.9-3 %mass ethylene units. The back surface protection sheet has sealing material adhesion strength of 30-70 N/15mm, measured by the predetermined adhesion test. The adhesion test of the back surface protection sheet is measured by cutting adhesion-enhancing layer of the back surface protection sheet sample into 15 mm width, sticking on a sealing material layer sample having dimension of 75 mmx 50 mmx .05 mm, processing by a vacuum heating laminator at 150 degrees C for 18 minutes, performing perpendicular peeling test in rate of 50 mm/minute test for the back surface protection sheet sample closely adhered on the sealing material layer sample by the peeling test machine (Tensilon universal-testing-machine RTF-1150-H), and measuring adhesion strength. An INDEPENDENT CLAIM is included for solar cell module.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of the back surface protection sheet.    Base material layer (61)    Adhesion-enhancing layer (62)    Core layer (621)    Surface layer (622)