The article deals with the problem of interpretative transformation of Heidegger’s understanding of being in postmodern thought. This transfotmation takes somewhat unpredictable conceptual forms as, for example, in Derrida’s «ontologies of differance and supplement» and in Baudrillard’s «ontology of branchments». The postmodern investigation of Heidegger’s notion of «being» has changed our understanding of main ontological approaches and problems. The aim of modern ontology is not to solve, but to pose a problem, and even an ontological statement itself is understood in postmodern thought as a starting point for problematic continuation.