Misbehavior is one of the components related to students’ personalities. The previous studies have confirmed that misbehaviors of students in the classroom affect negatively in teaching and learning process and personalities of pedagogical students. The level of misbehaviors of pedagogical students in the classroom at Can Tho University in Vietnam has not been insufficiently researched to remedy this situation. This study was conducted to seek to answer the question: is the occurrence of misbehaviors among students in Can Tho University, Viet Nam related to their gender, majors and school year? The questionnaires designed were delivered to 232 pedagogical students in Can Tho University, Viet Nam. The SPSS for Windows was used to code via, and analyze the data collected by Percent, Frequencies, Mean, Std. Deviation T-Test, and Spearman Correlation. The results of this study showed that pedagogical students had various kinds of misbehaviors conducted in the classroom. There were no correlations and significant differences between mean scores of misbehaviors of pedagogical students regarding gender and school year. Otherwise, correlations and significant differences between mean scores of misbehaviors of pedagogical students regarding majors were found. These findings help to put forward a suggestion that those who work in training and education need to pay attention to the characteristics of students’ majors in the process of adjusting misbehaviors for students