In this paper we provide a summary of the discussions between Villey and Tierney concerning the rise of a concept of subjective right in late medieval thought, William of Ockham’s place in it, and the differences of this subjective notion with regards to an objective notion of right. Afterwards, we analyze Ockham’s main texts. According to the authors, Ockham’s notion of a natural right of the individual bears a relationship both to a rational concept of morality and to his characteristic emphasis on the free choice of the will.