In this paper, a genesis of "media man" (homo mediatus), which is important and relevant problem of modern philosophy and human sciences, is presented. The "media man" is represented as a new anthropological type of social subject, which reveals himself in mass communication. Digital technologies being in use by him change his epistemological and ontological characteristics and define his social status. These facts make urgent comprehension of modern communicative ontology problems.

Key words: communication ontology, "media man", digital technologies, informational rationality, media space, mass media.