The article is focused on the statement on the problem of the of formation of the self-concept as a personality integrated characteristic. Theoretical and methodological approaches to the study of the personality psychological functioning mechanisms that are intended to keep the self-concept of personality are considered. The idea that self-concept serves as the set of all human conceptions of himself that are filtered with subjective corporealitive experience, is substantiated. On the basis of conceptual analys it is stated that the components of self-concept operate in indissoluble unity.The autirs emphasize that the psychological defense mechanisms as a means of keeping the integrity of personality's self-concept transform the subjective corporealitive experience. It is supposed that mental activity with its intense social attributesmotives, resources, values, goals,directly affects the formation of personality's self-concept.