Classroom discipline is one of the main study topics of contemporary educators. Even in developed western countries it is regarded as the primary problem of education. Classroom discipline is one of the many conditions that are necessary for reaching educational targets. Many factors like desired and undesired student behaviors, student-student, student-group, student-teacher, group-teacher relationships, students' level of readiness, students' attitudes towards lessons, students' social milieu outside the school, teachers' style of establishing relations with students, teachers' lecturing style and physical conditions have a direct or indirect affect on classroom discipline. This makes clear that classroom discipline is actually an issue of relationship and requires a particular importance. In this paper, the author tried to clarify the reasons of discipline problems in classroom, and suggested some practical ways to diagnose these reasons, and to cope with these types of problems.