Executive function of council is one of the issues which has been raised related to this institution. Subjects such as the responsibility of council members for the executive affairs have made some people doubt about identifying the aforementioned function in council institutions. Therefore, the question arises as to whether we can recognize this function for the Council institution or not? Using the legal and jurisprudence sources and rules in this field, this study investigates the councils’ executive function and stating the issues brought up in that field, employing descriptive-analytic approach.The result of the study was as follows: in jurisprudence sources, some executive functions for the council such as council competence of the selection of Muslim ruler, has been established and provided. Similarly, in the legal system of Islamic Republic of Iran, this function has been established in many cases such as former Supreme judicial council, local council, and administrative councils in accordance with constitution and regulations. Dealing with this issue, the guardian council has also viewed it with caution. But what is indisputable, is the council’s competence in this field.