Despite the adoption of various laws to prevent rent-taking, many evidences from the political, economic and administrative relations in the country show that unfair privileges and unfair privileges due to the status of individuals have become a common and widespread matter. In this regard, it is appropriate to effectively confront this phenomenon by creating a culture and eliminating the grounds for rent-taking and criminalization. However, despite all the laws that are directly and indirectly related to the prevention and punishment of rent-givers and rent-takers, this act has not been criminalized separately in any law. Criminalization is one of the most important and sensitive tools to achieve the goal of combating corruption and unfair discrimination, and the lack of use of such tools to deal with the prevention of rent-taking in the Iranian legal system is questionable. Especially since the legal system based on Islamic ideas considers itself obliged to deal with manifestations of corruption. By carefully examining the spread of rent-seeking in various forms and its very negative consequences and effects on society, this research on the nature of rent-seeking, along with its theoretical aspect, can be a practical guide, especially in terms of approving laws and executive policies. Accordingly, the present research has examined the legal and criminological nature of rent-seeking using a descriptive and analytical method and using library resources.