A systematical interpretation of Kant’s critical philosophy requires the elucidation of what can be considered a critical use of reasoning by analogy. Analogical thought was largely employed in traditional philosophy, even in Kant’s time. My proposal in this paper is to clarify what kind of use remains for the analogical thought after Kant’s copernican revolution in metaphysics. The main issue is of course the function of analogy in Kantian transcendental philosophy.