EN
The purpose of this paper is to present ontology of nature in the early Heidegger’s philosophy (1919–1929). Although Heidegger had never developed systematic “ontology of nature” as separated branch of the philosophy, problem of understanding the nature is one of the most important ones. I distinguish five different concepts of the nature: 1. the life, 2. that what is beyond understanding; the nature outside being, 3. the nature as a research object of nature science, 4. environment, 5. the nature in terms of ontology of body. The latter leads to question of well-founding the philosophy.