In this study, I propose to examine Marty's reconstruction of the general framework in which Brentano develops his theory of consciousness. My starting point is the formulation, at the very beginning of the second chapter of the second book of Brentano's Psychology, of two theses on mental phenomena, which constitute the basis of Brentano's theory of primary and secondary objects. In the second part, I examine the objection of infinite regress raised against Brentano's theory of primary and secondary objects and (...) Marty's interpretation of Brentano's theory of the unity of consciousness. The third part bears on the important distinction between implicit and explicit consciousness, which Brentano introduces in his lectures on descriptive psychology. Here, I analyse Marty's principle of individuation in light of the modifications which Brentano made to his theory of consciousness after the publication of his Psychology in 1874. The last section is an examination of Marty's conception of consciousness as self-consciousness with respect to his principle of individuation. (shrink)