High-molecular-weight compound having substituted triarylamine skeleton

A high molecular weight compound comprising a substituted triarylamine structural unit represented by a general formula (1) below,

• where Ar1 and Ar2 are each a divalent aromatic hydrocarbon group or a divalent aromatic heterocyclic group,
• R1 and R2 each represent a hydrogen atom, a heavy hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, an alkyl group with 1 to 8 carbon atoms, a cycloalkyl group with 5 to 10 carbon atoms, an alkenyl group with 2 to 6 carbon atoms, an alkyloxy group with 1 to 6 carbon atoms, or a cycloalkyloxy group with 5 to 10 carbon atoms, and
• X, Y and Z are, on the condition that at least one of them is an aryl group or a heteroaryl group, an aryl group, a heteroaryl group, or a group similar to the groups represented by R1 and R2 above.