There are two main approaches in the constitution of the Islamic Republic of Iran; In the first approach, equal value to the principles of the constitution has not been considered and some of the principles are in a higher position so that the hierarchy of constitutional principles is considered. In the second approach, the constitution is regarded as integrated collection and no one has superiority over another and in case of any ambiguity, all the principles should be interpreted according to the principle of popular sovereignty. As a result, two different conception of popular sovereignty is conceivable that sometimes argued as different sovereignties; dual and single. There is a meaningful relationship between the notion of sovereignty in the constitution and the people's right to self-determination. The main research question is that, which concept of the sovereignty to be recognized by the constitution; dual or single? What is the impact of the recognition of each approache on the people's right to self - determination?