This paper presents a research on school bullying of students in some high schools in Ho Chi Minh city. The study was conducted on 1399 students in grade 10, 11 and 12 from five high schools in Ho Chi Minh city. The objectives were finding students' awareness of safety at school, the presence of bullying at school, objects vulnerable to bullying, and ultimately cause of bullying. Conclusions and recommendations were given to help find solutions to the problem of school bullying.