Obesity prevalence rate for adolescents aged 13-15 years in Semarang is twice the prevalence rate of Central Java province. The impact of obesity that can occur in teenagers is not only health problems, but also psychosocial problems. The aim of this study was to determine the status of obesity as a risk factor for psychosocial disorders in adolescent girls in Semarang. This study used case control design. The number of subject as many as 92 adolescent girls aged 13-15 years which were divided into 2 groups, Subjects were consisted of 46 obese and 46 normal (healthy weight), Subjects were asked to complete 5 questionnaires: Pediatric Symptom Checklist-17 (PSC-17), Body Shape Questionnaire-16 (BSQ-16), Rosenberg Self-Esteem Scale (RSES), Bullying Behaviour Measurement, and Children Depression Inventory (CDI). Data were analyzed using chi-square test. There were differences in psychosocial disorders between obese and normal adolescent girls (p = 0.000), Obese adolescent girls have a risk of psychosocial disorders 6.935 times compared to normal adolescent girls. There were differences in body image (p = 0.000), self-esteem (p = 0.022), and bullying (p = 0.003) between obese and normal adolescents girls. There was no difference in depression between obese and normal adolescent girls (p = 0.186), Obesity as risk factor of psychosocial disorders in adolescent girls. Psychosocial disorders that occur in obese adolescent girls are negative body image, low self-esteem, and bullying.