In the present paper, some of the most important concepts and principles of Cornelio Fabro’s work are addressed, in order to weigh the scope, originality and consistency of his speculative position on the notion of freedom. In the first part, the intellectual and scientific itinerary of Cornelio Fabro is presented. In the second part, the metaphysical and existential ground of freedom is examined and a fast tour around the most representative philosophical authors of modernity involved in his thinking is done. In the third part, some brief final considerations are made in which the central topics developed in this work are delimited.