ENIn article, development of understanding of self in Heidegger's theory after the edition of the book “Being and Time” is investigated. Values of concept of self of contexts of discussion of an ecstatic ek-zistention of the person, identity, a question, an event, language are discussed. The author interprets self not as a reality, and as creative process, awareness of human limitation, belonging to world around, life opened to that didn't reach definiteness yet. Key words: self, Dasein, person, ek-zistention of the person, late thinking of Martin Heidegger, eigene, uneigene.