This survey research was conducted to study bullying behavior of students in schools underthe Bangkok Metropolitan in Huay Kwang District, Bangkok Metropolitan. Three hundred and twentynine students were selected by stratified random sampling from schools in Huay Kwang District.Questionnaires on bullying behavior were used for data collection. Percentage, mean, standarddeviation and Chi-square test were applied for data analysis. The results showed that the students hadbullying behavior at a low level. The students with GPA under 2.00 had more bullying behavior thanthe students with GPA over 2.00 (p < .001). There was no significant difference in bullying behaviorbetween male and female students (p = .474).