The confusing oscillations of attachment of borderline personality disorder are described. This behaviour is proposed to render impotence that may undermine the therapeutic relationship. The authors present a system approach of this interactional problem in which psycho-educational, supportive and directive techniques are supplementory. The main issue in this approach is the regulation of the psychological distance between the parties involved: the family, the person with the borderline personality disorder and the therapist. In this context the treatment of both borderline traits and behaviours as well as Axis-I disorders of frequent occurrence are established.