【正】 Identical superdeformed bands in <sup>191</sup>Au and <sup>191</sup>Hg have been investigated byusing particle-rotor model within the framework of the BCS (Bardeen-Cooper-Schrieffer) pairing correlation.The identity in the γ-transition energies in these bandsshows that the properties of specific individual orbitals may be important to understandidentical bands.