The article considers the role of the “existence aesthetics” notion in M. Foucault’s political-philosophical project. The paper emphasizes the inconsistency of the Foucauldian conception of liberation without taking into account a subject’s self-transformation, which makes it possible to focus on the idea of existence aesthetics as a possible strategy of an individual’s action in the context of biopolitics. The analysis of M. Foucault’s notion “existence aesthetics” shows that aesthetics of oneself allows avoiding biopolitical normalization in the process of a subject constituting and acts as a condition for positive spiritual experience that turns intellectual criticism of biopower into specific philosophical ethos.