Objective:Obesity is a chronic disease which leads to medical and psychiatric complications. Family climate is a critical factor in the treatment of obesity and comorbid psychiatric disorders. In our study, perceived expressed emotion (EE), psychopathology, self-esteem and emotional and behavioural problems (BP) among obese adolescents were investigated and compared with their non-obese peers.Methods:The subjects were 49 obese adolescents and 47 non-obese adolescents served as the control group. All participants were requested to fill out the Socio-demographic Data Form, Shortened Level of Expressed Emotion Scale, Rosenberg Self-Esteem Scale, Strength and Difficulties Questionnaire-Adolescent Form.Results:In our study, obese adolescents showed a significant difference in perceived EE (p<0.001). Subscales of EE, such as Lack of Emotional Support (p<0.001), intrusiveness (p<0.001), irritability (p<0.001), self-esteem (p<0.001), emotional and BP (p<0.001), attention deficit-hyperactivity disorder (p<0.001), problems in peer relationships (p<0.001) and social skills (p<0.001) were significantly worse when compared with the control group. There was a strong relationship between EE and emotional and BP and self-esteem.Conclusion:The higher rate of perceived EE, psychopathology and low self-esteem among obese adolescents showed that obesity prevention and treatment are also crucial for good mental health in adolescents. The important role of the family in mental health of obese adolescents was emphasized. It was shown that identification of risk factors in childhood that promote obesity should be done so that targeted intervention and prevention programs can be developed.