A thin film photoelectric converter, especially an integrated thin film photoelectric converter having improved photoelectric conversion efficiency is provided by controlling an open-circuit voltage and a fill factor so as not be small in a thin film photoelectric converter including a crystalline silicon photoelectric conversion unit. The thin film photoelectric converter by the present invention has at least a transparent electrode film, a crystalline silicon photoelectric conversion unit, and a back electrode film formed sequentially on one principal surface of a transparent substrate, and the converter has a whitish discoloring area on a part of a surface of the converter after formation of the crystalline silicon photoelectric conversion unit. A percentage of dimensions of the whitish discoloring area preferably is not more than 5% of a dimension of the photoelectric conversion area. A thin film photoelectric converter of the present invention is preferably an integrated thin film photoelectric converter.