Abstract This study aims to determine the analysis of student behavior deviations during the learning process in class X Pontianak Mujahidin High School. The method used is descriptive method and the form of research is a form of relationship research study. The population in this study were 62 students of class X SMA Mujahidin Pontianak. This study uses a quantitative approach. Data collection techniques used are indirect communication techniques and data collection tools with this questionnaire. While the data analysis technique uses the percentage formula.Based on the results of this study indicate that the forms of student deviation when the learning process reaches 91%, the factors that cause learner's behavior deviation during the learning process 91%, the effects of student deviations during the learning process 91% while the efforts made by counselor teacher to help overcome student behavior deviations during the learning process 87%Based on the results of research that has been done, it can be concluded that in this study categorized as 'high' with a percentage of 90%. So in this study there were deviations of students during the learning process in class X Pontianak Mujahidin High Schoolâ€. Keywords: Behavioral aberration, Learning Process