The importance and urgency of growing entrepreneurial intention among students and graduates have attracted the attention of policy makers and scholars for past years in Iran. The purpose of this paper is to identify the deterrents of entrepreneurial intentions in the University of Tehran's students. A research-made questionnaire is used accompanied by interviews with experts to collect data analyzed in this study. The population consisted of 1647 master students from three colleges (College of Engineering, College of Psychology and Education and Faculty of Entrepreneurship). Samples (138 persons) are selected via random sampling. The conceptual framework of research is designed using synthetic application of the prior models exist in the literature. The results of this paper indicate that, although in the three dimensions of attitude, social norms and perceived self-efficacy, specific deterrents are not observed, 89 percent of students have perceived good social assistance from the society. Students think that the university isn't persuasive of new ideas. They do not receive entrepreneurial skills in the university, and thus the social/economic condition is not suitable for launching new businesses. Accordingly there are not public and private sponsoring institutions and further recruitment of expert human resources and issue of legal licenses for new businesses are difficult and finally, access to appropriate social networks, suppliers, investors and customers is not easy and receipt of information for starting new businesses is hard.