SUMMARY
Behavior that violates school rules or regulations continues to occur due to various factors. This study aimed to analyze the factors that trigger the behavior of violating the rules of conduct by students Junior High / Madrasah Tsanawiyah (MTs) Islamic Boarding School Al-Fatah Natar, South Lampung Regency. The research approach was descriptive qualitative with the case study method. Data collection techniques used in-depth interviews, non-participant observations, and field documentation. The data analysis technique used was proposed by Miles and Huberman, consisting of stages of data collection, data reduction, data presentation, and drawing conclusions. The research subjects were students who violated the rules. This study found that the triggers for the behavior of students' violations were caused by a sense of being constrained by many regulations, wanting to feel freedom, past experiences, until there was a sense of compulsion because going to boarding school was not what they wanted. In this case, self-control is needed to be able to restrain the students from misbehaving.