In recent decades, explaining the adverse effects of imprisonment has been one of the most important concerns of lawyers, criminologists and other experts. This is not exclusive to theoretical and academic circles and has been reflected in the practical approach of many criminal justice systems to different extents and degrees. Despite what was said, imprisonment is still one of the most important punishments in different criminal policy systems, including in Iran's criminal policy. The aforementioned fact has revealed the need to address the inefficiency factors of this punishment more than ever; Based on this, the purpose of this article is to examine the question of what are the bases of the ineffectiveness of imprisonment in judicial criminal policy? This is a theoretical article and it has investigated the mentioned subject by using descriptive analytical method and in a library form. The findings indicate that at the level of judicial criminal policy, the directive-oriented and management-oriented approaches of the judicial system, the social background of judges, high workload and lack of sufficient expertise in them, as well as some of the orientations of the judicial procedure, should be among the most important factors of the inefficiency of imprisonment. enumerated