In this work, I analyze Gary FrancioneÂ’s arguments concerning the need and justice of the recognition of the condition of Â“subject of rightsÂ” to great primates, on the part of the humans, with the consequent attribution of Â“juridical personalityÂ” to those animals. I add to the arguments of Francione, the concepts of Peter Singer, that give sustentation to his theory, as it admits that author.