PROBLEM TO BE SOLVED: To provide a novel arylamine polymer having an excitation triplet level of 2.5 eV or higher, to provide a manufacturing method thereof, and to provide an organic electroluminescent element containing the arylamine polymer.SOLUTION: A arylamine copolymer represented by the general formula (1), where Arrepresents a bivalent aromatic hydrocarbon group having 6 to 24 carbon atoms or a bivalent heteroaromatic hydrocarbon having 4 to 20 carbon atoms, Ar, Ar, Ar, Arand Arrepresent each independently an aromatic hydrocarbon group having 6 to 24 carbon atoms or a heteroaromatic hydrocarbon having 4 to 20 carbon atoms, R, R, Rand Rrepresents each independently a hydrogen atom, an alkyl group having 1 to 8 carbon atoms or a phenyl group, and n represents an integer of 2 or more, is used.