The present paper aims to discuss Kant’s critical solution for the possibility problem of thetranscendental idea of freedom. The problem consists in the supposed incompatibility between that idea andthe natural causality. Despite the impossibility of a dogmatic solution for the conflict, the philosopherproposes a critical solution. This critical solution frequently is interpreted as a attempt to make freedomcompatible with natural causation. There are, however, some divergences about the form and theimplications of that compatibility. I intend to defend that the compatibilism that result from Kant’s criticalsolution doesn’t assure the real possibility of freedom, but only its logical possibility.