The work tackles the question of wheter, and in what sense, Patočka's phenomenology is first philosophy and strict science. It does this by considering the problem ot the relationship of phenomenology, as a doctrine about appearing, to epistomology and to ontology. After an analysis of the conceptation of phenomenology which Patočka works with his dissertation and habilitation on the natural world, the study moves on to Patočka's late thinking, especially to the conception of an "asubjective phenomenology". The interpretation distinguishes various phenomenological approaches which are intertwined in the project of asubjective phenomenology, and its points to their weak points. Finally it identifies an acceptable conception of phenomenology in that which is presented in Patočka's lecture cycle Tělo, společenství, svět (Body, Community, Language, World). and Martin Ritter.