Bullying is an issue that is difficult to be eliminated in schools. Bully activity in school is a discipline problem and may interrupt the teaching and learning process. It often receives attention from parents who are concerned that such activity can develop into fights, which can lead to serious injury or even death. The study was conducted in one secondary school in Kuala Lumpur. The case study intends to gather in depth information about bullying factors in school. The school was chosen based on the information from teachers about the existence of a relatively serious case of bullying. From in depth interviews that was conducted towards 20 students, the researcher found that bullying factors included aspects of the students personalities such as ego, irritability, revenge, fun, the influence of others and elements of racism.