The present study has the purpose of analyzing a concept widely approached by most scholars of the philosophy of law throughout the ages, we are referring without doubt to the term person. That is why we will review the most important and relevant ideas from ancient times to current thinking. The philosophical concept of person has a notorious role in the understanding of the human being and in modern debates both in politics, law and, of course, in ethics. The aforementioned problem has been studied from very different perspectives, however, many coincide in adopting a metaphysical attitude. Therefore, the ontological and legal implications of the concept of person will be analyzed, starting with greek philosophy, classical law and christianity.