Disclosed is an organic photoelectric conversion device including a pair of electrodes, at least one of which is transparent or semi-transparent, and an organic layer arranged between the electrodes and containing a conjugated polymer compound and a sulfur-containing heterocyclic compound, wherein the sulfur-containing heterocyclic compound has a condensed polycyclic structure or a bithiophene structure. Examples of the sulfur-containing heterocyclic compound include a compound represented by formula (1): (wherein, a plurality of R1's may be the same or different and each represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an alkylthio group, an aryl group, an aryloxy group, an arylthio group, an arylalkyl group, an arylalkoxy group or an arylalkylthio group, and a hydrogen atom or atoms contained in these groups may be substituted by a fluorine atom or atoms; and m represents an integer of 0 to 10) or the like.