The author examines the phenomenon of multiple personality from a self psychology perspective. His central thesis is that multiple personality as seen in the clinician's office is a form of mirror transference. These patients seek what was denied them as children: acceptance, recognition, and confirmation. Although hypnosis aimed at unifying the different personalities is the goal of most treatment, the author believes that the mirror transference relationship in the context of the hypnosis is the crucial element in making the treatment effective. Exploring case examples from the literature, he shows in one case how the goal of reintegration is prepared for by the therapist through the acceptance and legitimization of the anger experienced by the "alter self." Other cases are used to illustrate that hypnosis itself