Provided is a photoelectric conversion element capable of suppressing a decrease in strength. A photoelectric conversion element comprises: a photoelectric conversion layer (26); an electrode layer (24) adjacent to the photoelectric conversion layer; a collecting electrode (30) adjacent to the electrode layer; and a conductor (50) joined to the collecting electrode. The thickness of the collecting electrode (30) at least at a joint portion between the collecting electrode (30) and the conductor (50) is 4 μm or more.