The prison aftercare has a great impact on prevention of recidivism. With resocialization, reintegration and positive changes as a result of the program we can reduce the possibility of recidivism. Decreasing the risk of repeating the criminal offense and successful reintegration into society and are not only in the best interest of the prisoners but also of the community to which they return after the imprisonment. Rehabilitation of the offenders starts in the penal instution where they serve the sentence and it is continued after they are released. The penal institution should incude prisoners in various treatments that can help prepare them for the release. Prison release and community reentry are often very hard because of the stigma that surrounds a former convict, therefore the collaboration of institutions can play a great role in preparing inmate for prision release. The crucial institutions are prisons and penitentiaries, the system of social welfare, probation system, police, civil society organizations and local community. Preparation for prison release and prison aftercare are determined by the law. This thesis is trying to provide an overview of national and international literature outlining the concept of prison aftercare, advantages of resocialization, important institutions and their collaboration.