The article is an analysis of the evolution of the institution of furlough as a reward for inmates since 1975. According to Article 30, Subsection 3 of law No. 633, furlough is an essential element of prison reform. Furlough for good conduct is a fundamental instrument in rehabilitation. The objective and subjective reasons which the Supervising Judge must consider in order to decide whether or not to grant leave are then analyzed. The purpose is to ensure, as much as possible, that the convict on leave not only does not escape and commit offenses, but also uses this time in a constructive, positive manner. The acceptance or rejection decision can be appealed before a Board (Supervising Board for convicts, Court of Appeal for the accused) by any interested party. The article devotes special attention to the role of the welfare service in providing the necessary control over and support of the convict while on leave. Without this, the inmate runs the risk of leaving the prison without achieving any of the goals that the reform was intended to develop. 61 footnotes and 70 references