The aim of this paper was to review the current knowledge about comorbidity between personality disorders and eating disorders. Personality disorders implicate a poor prognosis in anorexia and bulimia nervosa. Cluster C personality disorders, particularly obsessive, avoidant and dependent personality disorders, are the most relevant in anorexia. However, in bulimia, an impulsive temperament and borderline personality seem to be the most significant psychopathological features. Finally, implications for further research in this field are commented upon.