NOVELTY - An organic thin-film solar cell consists of a photoelectric conversion layer provided on a to-be-printed base material having a silicone group glass cloth composite sheet. The photoelectric conversion layer is formed by transferring an ink on a to-be-printed base material by a flexographic printing plate, carrying out dry-removal of the fluid medium, and fixing. The printing plate comprises a resin composition containing a polymer manufactured using polycarbonate diol having hydroxyl group at both terminals.    USE - Organic thin-film solar cell of Schottky type or bulk heterojunction type.    ADVANTAGE - The organic thin-film solar cell has a photoelectric conversion layer formed with high reproducibility without being influenced by heating or cooling during manufacture. The solar cell has high accuracy and definition, and can be manufactured economically with high productivity. The silicone group glass cloth composite sheet has excellent transparency, flexibility, and heat resistance, low coefficient of linear expansion, low change in storage elastic modulus by temperature change, and low swelling and deformation by heating. The flexographic printing plate has excellent durability and laser-engraving property. The solar cell is lightweight and compact.    DETAILED DESCRIPTION - An organic thin-film solar cell consists of a photoelectric conversion layer provided on a to-be-printed base material having a silicone group glass cloth composite sheet having a structure obtained by compounding a silicone group hardened component and glass cloth. The photoelectric conversion layer is formed by transferring an ink on a to-be-printed base material by a flexographic printing plate, carrying out dry-removal of the fluid medium in the transferred ink, and fixing. The flexographic printing plate comprises a resin composition containing a polymer manufactured using polycarbonate diol having a number average molecular weight of 300-50000 and hydroxyl group at both terminals, and having repeating units of formulae: -(-O-(-R1-O-)n-C(=O)-)- and/or -(-O-R2-O-C(=O)-)-.    R1=2-50C linear and/or branched hydrocarbyl;    n=2-50;and    R2=10-50C linear and/or branched hydrocarbyl.    An INDEPENDENT CLAIM is included for manufacture of organic thin-film solar cell.