Disclosed is a triphenylamine derivative represented by general formula (1): wherein R1, R2, R3, and R5 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted phenyl group, R4 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted phenyl group, Ar represents a substituted or unsubstituted phenyl group, and m represents an integer of 1 to 3.