Abstract: Foucault advanced the theory of micro-power in the 1970s which led to the criticism from Poulantzas, a well-known Structural Marxism theorist. Foucault advocated a deep investigation into the diversity and uncertainty of the power at a micro level. Poulantzas, however, focused on the structural characteristics of power, and believed that power indicated the influence of the structure on the inter-relations between different classes in conflict. He pointed out the limitations of Foucault's thought from a macro dimension of the state power. Poulantzas further criticized Foucault's power theory from the relation between power and production, power and state, power and class struggle, and power and knowledge, which led us back to Marx's capital and power analysis and a unity between the macro power and micro power.

Key words: Foucault, micro-power, Poulantzas, structuralism, Critique