Eating disorders in patients with type I diabetes show some peculiar clinical features. We report the case of a young type I diabetic woman with binge eating disorder and dysthymic disorder. The patient shows a poor metabolic control and her body mass index is within the normal range. The eating disorder has been present for 3 years, and it developed after recurrent nocturnal hypoglycemic episodes. The authors discuss the complex relationships between binge eating disorder and hypoglycemic reactions and underline the diagnostic problems typical of comorbidity between type I diabetes and binge eating disorder.