The Diagnostic and Treatment Center of Clinton Prison was established in October 1966 by the Department of Correction of the State of New York with the assistance of the Forensic Clinic of McGill University in Montreal. Its functions are diagnosis and prediction, treatment, and rehabilitation of chronic offenders as well as research. At present, the Center has fifty inmates with the imminent arrival of fifty more, all of them recidivist felons, between the ages of twenty-five and thirty-five with an I. Q. of not less than ninety. The Center represents a type of therapeutic community with some freedom for self-government given to the inmates. It still is part of a maximum security prison. The difference as we see it is that it features a special kind of environment in which psychotherapy is well valued and accepted. We think of this special kind of milieu as being one of the main keys in opening ways through which psychotherapy may enter a prison setting and so far our efforts in this direction seem to be producing encouraging results.