NOVELTY - An ink for an electron-accepting organic material layer and/or an ink for an electron-donating organic material layer are transferred on a to-be-printed substrate, and fixed on the to-be-printed substrate to obtain electron-accepting organic material layer and/or electron-donating organic material layer. The ink for electron-accepting organic material layer and/or electron-donating organic material layer is obtained by curing a resin composition comprising a polymer derived from polycarbonate diol having a repeating unit (1 or 2).    USE - Manufacture of electron-accepting and/or electron-donating organic material layer used for photovoltaic element for photosensor.    ADVANTAGE - The method enables manufacture of electron-accepting and/or electron-donating organic material layer efficiently.    DETAILED DESCRIPTION - An ink for an electron-accepting organic material layer and/or an ink for an electron-donating organic material layer are transferred on a to-be-printed substrate using a flexo printing plate. The solvent of the transferred ink for electron-accepting organic material layer and/or ink for electron-donating organic material layer is removed or ink for electron-accepting organic material layer and/or electron-donating organic material layer is light-irradiated and cured. The ink for electron-accepting organic material layer and/or ink for electron-donating organic material layer are fixed on the to-be-printed substrate to obtain electron-accepting organic material layer and/or electron-donating organic material layer. The ink for electron-accepting organic material layer and/or ink for electron-donating organic material layer are obtained by curing a resin composition comprising a polymer derived from polycarbonate diol having number average molecular weight of 300-50000, and a repeating unit of formula: -(O-(R1-O)n-C(=O))- (1) or -(O-R2-O-C(=O))- (2). The both terminal groups of the polycarbonate diol are hydroxyl groups.    R1=linear or branched 2-50C hydrocarbon group;    n=2-50;and    R2=linear or branched 10-50C hydrocarbon group.