The purpose of the present invention is to provide a flexible solar cell that has a photoelectric conversion layer comprising an organic-inorganic perovskite compound, and that has excellent light resistance and photoelectric conversion efficiency. The present invention is a flexible solar cell having a structure in which a metal foil, an electron transport layer, a photoelectric conversion layer, a hole transport layer, and a transparent electrode are stacked in that order, wherein the photoelectric conversion layer contains an organic-inorganic perovskite compound represented by general formula R-M-X3 (where R is an organic molecule, M is a metal atom, and X is a halogen atom or chalcogen atom).