Background and Objective: Inappropriate behaviors in academic environments can strongly disturb both teaching and learning processes and make conflict and anxiety between instructor and student. The main objective of this study was to investigate students' attitude on inappropriate behaviors in academic environments. Materials and Methods: This research was a cross-sectional descriptive study conducted in 2012. A questionnaire was designed by the researcher and all students of Faculty of Dentistry voluntarily participated. Data was analyzed using SPSS18 software, descriptive, independent T, ANOVA, and Spearman’s correlation coefficient; P ≤ 0.05 was considered significant. Results: Results of this study indicated that the majority of students considered sleeping in class as an inappropriate behavior, while checking the time at the end of class was the most common behavior which was reported by them. A significant relationship was observed between students’ perspective on inappropriate behaviors and the manner they did them; as Spearman statistical test indicated a high correlation between their perspective and frequency of inappropriate behaviors (R = 0.55 and P = 0.0001). Conclusion: Findings indicated that the majority of students had a negative attitude towards inappropriate behaviors. Besides, the frequency of doing these behaviors cannot be justified by this research team. Regarding the negative effects of inappropriate behaviors on education process, it is recommended to take some actions for cherishing instructors and students in academic environments.