This essay intends to show critical abilities of M. Foucault's thought. It purposes that assertion to structural and relativistic narratives of foucault's thought, and interpration of it on Heidegger, prevents to see critical aspects and critical thought project of Foucault. The essay argues that in regard to critical thought, and out of limits of previous critical theory, Foucault, without going to post – critical trends, has a unic position. His innovations in criticiam, power, and his attention in recent period to subject and enlightenment, has valuable achievements to critical thought, so that they has influenced various argumonts of such thinkers as jilles deleuze, jiorgio agamben and Antonio Negri.
)