The study aims to investigate the effect of the application of positive behavior support plan on the improvement of behavioral problems of a child suspected of having emotional and behavioral disabilities. A counseling team composed of the homeroom teacher, who was the researcher of this study, the dean of students' affairs, another teacher from this class, a janitor and a volunteer was formed. In the beginning, functional assessment was employed to analyze the cause of the subject's behavioral problems. Next, based on the results of the assessment, five categories of support strategies were devised. The results showed the occurrences of the subject's negative behavior decreased and those of positive behavior increased. After the intervention ceased, the effects remained. In addition, the analysis of the qualitative data revealed a noticeable improvement in the subject's behavior and attitude.