Self-discipline and Student discipline and is a complicated process in students’ life this involves a lot of people like school staff, students and their parents. It may mean something very different to people from different backgrounds, with different experiences and in different circumstances. Most schools have rules and a reward/punishment scheme to monitor students’ behaviour. Thus when the issue of discipline turns up in to a discussion, then the argument would centre on how many rules there should be, whether there is too much or too little punishment, and what kind of punishment and reward works best. In this article I will present a meaning of discipline in students’ life, importance of discipline, the causes of indiscipline and I will suggest ways to instill discipline and how a teacher can maintain disciplinein the classroom.