As a form of a private prison, a religious prison implies to a prison with religious programs arranged by a religious organization and operated based on such programs. We denounced a private prison a great deal repeatedly until its introduction was finalized in 2001, and it was approved in a form of a religious prison. A religious prison was approved under great expectations of securing effectiveness of correction, enhancing efficiency of correction, and assuring and expanding human rights of prisoners based on the spirit of religion originally. However, a possibility of an unfair treatment, infringing human rights of prisoners, losing the authority of a national prison, and misusing the rights of punishment by a religious prison may also be raised. Because such possesses ambivalence of being able to accomplish the results appropriate for the purpose of introduction or to show an adverse effect depending on how a religious prisoner is operated. Accordingly, various forms of a religious prisoner must be introduced based on thorough supervision of the country in order for a religious prison to produce expected results. In addition, the outlook of a religious prison would be bright when an equal treatment and an unrestrained option for prisoners are guaranteed.