(anglicky): Michel Foucault can be hardly described as a convinced marxist, but at the same time, marxism serves as an implicit referential framework in his works against which he shapes his own approach. Nowhere is this ambiguous relation more discernible than in the case of Foucault's former teacher, a marxist theoretician Louis Althusser, with whom he also shares a certain connection with the tradition of french historical epistemology. His revision of marxist theory often displays a curious affinity to Foucault's theoretical projects which are always beyond the limits of marxism. The subject of this thesis will be a reconstruction of the relationship of Michel Foucault towards marxism through his - often hidden - interaction with Althusser's theory. In the first part, I will focus on the period of 1960s during which both authors from anti-humanist and almost structuralist positions reflected questions of epistemology or the position of subject in history. Afterwards both authors move issues such as constitution of subject, power and the marxist conception of ideology, which they either revise (Althusser) or fully abandon (Foucault). In the final part I will focus on the questions of politics and on strategies which are in the cases of both authors provoked by the political changes of their...