One of the influential factors on the success of all organizations and governmental and nongovernmental institutes is their customers' satisfaction. On the other hand, one of the influential factors on the customers' satisfaction is the quality of the given services by that organization. The educational system of the country as an organization has got so many responsibilities in the society which the most important of these responsibilities serving the high quality education. However, there are no specific methods for measuring the quality of the educational services. Therefore, the goal of this study is presentation a model for measuring the quality of the educational services. In this research we are looking for a model for measuring the quality of the educational services by considering the population including 414 of students and teachers of Tarbiat Modarres University at the time period of 2012. Accordingly, a questionnaire was made for the purpose of testing the five hypothesis of the research and finally all of them are studied based on the five aspects which should be considered for measuring the quality of the educational services including the physical appearance and facilities of the organization, reliability, the degree of responsiveness, quality assurance and the customers' empathy or understanding. The results of the research indicate that the students' expectations are more than their understanding in all of the five aspects of the educational services.