Objective: We aimed to investigate the effects of a structured cognitive behavioral group therapy (CBGT) on weight loss, depression, anxiety, body image and self-esteem levels in women with obesity treatment and to show that cognitive behavioral therapy may also be effective in the treatment of obese women receiving antidepressant medication in our study. Methods: Fourteen sessions of CBGT were administered to 28 obese female patients who met inclusion criteria. Measurement and clinical scale application were made before and after the therapy. Six months after the therapy, the patients were asked about their weight by phone call. Sociodemographic Information Form, body mass index (BMI) monitoring, DSM-IV based Structured Clinical Interview, State-Trait Anxiety Inventory (STAI), Beck Depression Inventory (BDI), Short Form-36 (SF-36), and Symptom Check List-90 (SCL-90) were applied to the cases. Results: A statistically significant decrease in patients' weight and body mass index were found after 14 sessions of therapy (p [Anadolu Psikiyatri Derg 2020; 21(3.000): 269-276]