This research is based on the level of discipline violation by students of SMK KANSAI Pekanbaru is still quite high. So the authors take the title of research "Analysis of Factors Cause Student Discipline Violation in SMK KANSAI Pekanbaru". The formulation of the problem in this research is: What is the dominant factor and the reason students do violation of student discipline in SMK KANSAI Pekā¦