Provided is a polymer comprising a repeating unit represented by formula (1), ##STR00001## wherein, A.sup.1 represents a divalent group in which the bond distance ratio (bond distance of C(.alpha.)-A.sup.1/bond distance of C(.alpha.)-C(.beta.)) is 1.10 or more; R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6, each independently represent a hydrogen atom, alkyl group, alkyloxy group, aryloxy group, arylalkyloxy group, etc. The polymer is useful as a light-emitting material, a charge transporting material, etc.