Introduction: Binge Eating Disorder is characterize by the ingestion of a large amount of food in a short period and occurs with frequency in obese patients, mainly in those undergoing bariatric surgery. Obese with eating disorder present such psychopathological symptoms that interferes on the adhesion to treatment when undiagnosed properly. Objective: Evaluate the frequency of Binge Eating Disorder in obese patients and those undergoing bariatric surgery. Methods: Individuals of both genders participated in the study attended on a particular clinic of bariatric surgery, in Caruaru, Pernambuco. It was evaluated the presence of this disorder on obese patients candidates or submitted to surgery, athwart the Binge-Eating Scale (BES), a self-administered questionnaire whose purpose is to discriminate obese individuals according to the severity of Binge Eating. Furthermore was also evaluated the lifestyle (Smoking, alcoholism and physical activity practice) of the patients. Results: The sample was composed by 45 patients, being 82,2% women, 73,3% post-surgical patient and 26,7% pre-surgical patients. It was verified that 43,2% of the patients have Binge Eating, being observed a large frequency between the candidates for bariatric surgery (75%). Conclusion: The frequency of Binge Eating was superior in pre-surgical patients, when compared in those who performed the bariatric surgery. In the view of the above, it is essential to investigate the presence of this disorder in obese, candidates or not to the bariatric surgery, with a view to greater effectiveness and adherence of the adequate treatment of these patients.