Most people would agree that the prevention of a problem is more important than the measures of control and treatment. Neverthless, in the instance of crime, treatment is very difficult, because it is so hard to get on the target. We have tried valiantly to discover and to introduce measures in the Treatment of Offenders. There are so many difficult problems ; the classification of prisoners(classification within the institution, or classification by institution), the open treatment(open institution), the movilization of community resources(voluntary visitor system), pre-release guidance center(halfway house), community correctional centers, conditional release(parole) and civil inspector. In the Treatment of Offenders, there are several kinds of ones. For example, Juridical Treatment, Correctional Treatment, Institutional Treatment and Community based Treatment. The wise and standard method for the study of "the Rehabilitative Ideal in the Treatment of Offenders" will be taken pimarily from the "Standard Minimum Rules for the Treatment of Pisoners", 1957(revised 1977). Modrem society does expect imprisonment to serve a useful purpose beyond that of keeping known criminals confined. The prison, somehow, is supposed to further the goal of rehabilitation. The prison is an authoritarian community and will remain so, even if far greater attention than has been true in the past. It is excessively optimistic to expect the prison to refom all inmates, since it is the more serious or more hardend offender who is most apt to be confined. The agency of society concerned with the prevention and control of crime, in the form of prison, does not take revenge as its major goal either in lip service or in practice. Imprisonment, it is argued, receives its major justification today as a means for the protection of the state and for the return of the offender to the ranks of the law-abiding.