The article is the first attempt at a full description of the main ideas, notions and principles of the trialogical approach to psychological consulting and psychotherapy. The approach is based on the author's conception of the personality and essence of man, integrating national and foreign achievements in applied psychology. The quintessential idea of the approach is that the structure of man's fundamental relations (communications) and relations to self (autocommunications) as the subject, means and resourse of psychological consulting and psychotherapy constitute a trialogue.