NOVELTY - A thin-film solar cell module comprises electric output wiring, sealing layer (2), back surface support glass plate (3A) for taking out translucent glass substrate (1), solar cell element layer, and electric output outside sequentially from the light-incidence surface side. Solar cell element layer and whole surface of electric output wiring in sealing layer are covered with epoxy-modified polyolefin resin composition, and the material of this sealing layer contains 0-50 pts. wt. tackifying resin with respect to 100 pts. wt. epoxy-modified polyolefin resin, and a terpene-type resin.    USE - A thin-film solar cell module (claimed).    ADVANTAGE - Thin-film solar cell module can be manufactured while suppressing crack generation of glass material, specific sealing structure has excellent adhesiveness, and water vapor barrier property is effectively formed in the perimeter, resulting in excellent long-term quality-stable property, such as heat resistance, moisture resistance, hot-cold cycle resistance, and damp-proof freezing property, edge part sealing material is unnecessary, and cost reduction is achieved.    DETAILED DESCRIPTION - A thin-film solar cell module comprises electric output wiring, sealing layer (2), back surface support glass plate (3A) for taking out translucent glass substrate (1), solar cell element layer, and electric output outside sequentially from the light-incidence surface side. Solar cell element layer and whole surface of electric output wiring in sealing layer are covered with epoxy-modified polyolefin resin composition, and the material of this sealing layer contains 0-50 pts. wt. tackifying resin with respect to 100 pts. wt. epoxy-modified polyolefin resin, and a terpene-type resin. Water-vapor-permeation rate per 400 mu m in thickness is less than or equal to 5 g/m2.day, and thickness of sealing layer is 50-800 mu m which serves as perimeter of solar cell module. The sealing structure formed by translucent glass substrate, sealing layer, and back surface support glass plate are directly in contact.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional diagram of a solar cell module. (Drawing includes non-English language text).    Light- receiving surface side translucent glass substrate (1)    Sealing material (2)    Back surface support material (3A)    Cell for solar cells (4)