and objective: Students are the most dynamic people in the society and their health is to a great extent a prerequisite for the health of most individuals in the society. This study was conducted to investigate the state of mental health and factors which influence it in the students of Tehran University of Medical Sciences and Health Services.Materials and Methods: This descriptive-analytic study was conducted on 400 students of Tehran Medical Sciences University in the academic year

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... The number of studied subjects was determined according to the student population of each faculty and questionnaires were randomly distributed among them. The data collection tool in this study was the standard GHQ28 questionnaire. After collecting the data, analysis was done using SPSS.18 software, Chi-square test, T-test, and Regression Logestic.Results: 25.52% of the attendants were healthy and 75.47% had suspected mental disorders. Also, regarding depression, 75.53% of people suffered from mental disorders and 25.46% were healthy.Conclusion: According to the achieved results, it seems that studying at university, facing educational problems and the existing conditions at university cause an increase in the rate of mental disorder among the students of Medical Sciences University.