Ch. S. Peirce saw I. Kant as his direct predecessor. In his projects of scientific philosophy or scientific metaphysics he drew upon Kant’s intellectual legacy. The architectonics of Peirce’s philosophy is closely connected with Kant’s Critique of pure reason. Yet, Peirce could preserve the autonomy of his own reasoning. The paper offers an analysis of Kant’s multifold influence upon Peirce’s philosophy.