Abstract: According to studies, the rehabilitation means restoration reputation, honor and rights taken from victims and even offenders as well as elimination of all deprivations and social rights in addition to compensation for moral and material losses either due to defamation of individuals who have been victims of judicial errors or they have been suffered the effects of definitive penal sentence. Rehabilitation aims to remove effects of criminal conviction and make barrier to people who wish to file a biased and unfounded complaint. Rehabilitation is generally of two types: once the damage may be imposed on an individual’s dignity and independence due to actions by other people such as mistake and the fault of the judge or punishment for a false charge. Second, the loss may damage one’s social prestige due to his own action. Article 62 of the Penal Code, Act of 1998 was a good but incomplete, effort for recognition and establishment of legal rehabilitation. It was associated with restoration of civil rights to the sentenced person with the adoption of some effects of rehabilitation. It required revisions which have been carried out largely hence, many of the defects and shortcomings were removed. In general, rehabilitation is the most proper expression for eliminating or reducing unpleasant effects in Iran legal system. While explaining different concepts about rehabilitation, this study describes its principles, conditions and its effects in a descriptive-analytical approach.