Background and Aim: Classroom management has a significant impact on controlling and managing student behavior. The management of the classroom is an art and a science. The present study set to investigate the status of classroom management styles and types of undesirable educational behaviors among students of Zahedan University of Medical Sciences. Methods and Materials: In this descriptive study, 300 students were selected by stratified random sampling to study a variety of undesirable behaviors in an academic setting. Also, 100 faculty members from Zahedan University of Medical Sciences participated in the study to explore classroom management styles. Classroom management style inventory designed by Amini et al. (2014) were used. The self-administered questionnaire about undesirable educational behaviors was used to gather data. The validity and reliability of both instruments have confirmed .The data were analyzed in SPSS software version 16. Results: The findings showed that the faculty members’ average score of class management is 45.16 out of 100 , which indicates that the faculty members of this university have an interactive style. Also, the average score of undesirable educational behaviors was obtained 71.21. out of 135. Conclusion: Based on the findings of research on the use of interactive styles by faculty members, it is recommended to prepare training workshops for university professors. In order to reduce the undesirable educational behaviors of students at the beginning of the semester and upon entering the university, justification classes should be hold to control various educational behaviors and misbehaviors and management classes should be hold by cultural and social officials of university and oblige students to participate in such classes. Keywords: classroom management style, undesirable educational behaviors