In the complex pathomechanism of eating disorders (especially that of bulimia nervosa and binge eating disorder) the traumatic experiences (sexual, physical, emotional abuse, neglect) often play an important role. The consequence of traumas can be the borderline personality disorder, or different disorders of the emotional regulation. These occur mainly in the multiimpulsive subtype of eating disorders with impulse control disorders. In relation to the trauma dissociative phenomena are frequent. In the diagnostics of eating disorders the history of traumatization is essential. Among the therapeutical possibilities the psychodynamic approach is important. Moreover, the newer methods based on cognitive behavioral therapy are effective, e.g., dialectic behavior therapy, integrative cognitive-analytic therapy, and other complex programs of trauma processing, such as the trauma-informed care.