The organic light-emitting element of the present invention is an organic light-emitting element constituted by arranging a light-emitting layer between an anode and a cathode, and is characterized in that the light-emitting layer contains a polymer compound comprising a constitutional unit derived from an electron transport polymerizable compound represented by the following formula (1) and a constitutional unit derived from a phosphorescent polymerizable compound; wherein R1 to R14 are each independently a hydrogen atom, a halogen atom, a cyano group, an amino group, an alkyl group of 1 to 12 carbon atoms or the like, R15 is a hydrogen atom or an alkyl group of 1 to 12 carbon atoms, and X1 is a single bond or the like.