Introduction. Nowadays, obesity is considered as a chronic metabolic disease that occurs at any age. The relevance of the study is defined by the high prevalence of obese peopleThe objective was a psychological assessment of the level of compliance, emotional state, characteristics of eating behavior and satisfaction with the quality of life in patients with morbid obesity before and after bariatric surgery.Methods and materials. The study included 30 patients with morbid obesity who underwent bariatric surgery aged 26 to 53 years. Psychodiagnostic techniques and clinical scales were used to determine the level of compliance, emotional state and features of eating behavior.Results. The study showed that in patients with morbid obesity after bariatric surgery, the type of eating behavior changed towards stronger compliance to the diet, their emotional state improved but at the same time, satisfaction with the quality of life decreased. 6 months after the bariatric surgery, compliance to medical recommendations in patients decreased. Patients began to violate the prescribed regimen, depreciated the possible consequences and complications, and began to neglect some aspects of treatment and dietary compliance.Conclusion. It is important to pay attention to the creation of preventive programs aimed at informing patients about food composition and caloric value, awareness of habitual behavioral reactions to food stimuli and risk factors for repeated breakdowns.