The current thesis is a study about the transsexuality in the Brazilian Law. Based on central issues related to the dignity of the human person, the study analyzes the construction of the concept of transsexuality throughout history, especially of the Medicine History, searching for answers about the discriminatory treatment that the transsexuals are constantly submitted in the social environment. The origin of the vision of transsexuality is sought as something abnormal, sick, in need of repair, to finally deconstruct this stereotype that was established over time and that prevails nowadays, including in the legal environment. The constitutional principles of Equality, Dignity and the Right to Intimacy are used as the basis in the elaboration of a respectful treatment proposal to the people who present this behavior as deviant, but which is nothing more than the expression of its identity. The lack of actions of the Legislative Power, the discrepant action of the Judiciary in identical factual situations and the insufficiency of the Executive Power measures serve to show the urgency of the confrontation of the subject by the Brazilian Law. The examination of other legal systems is done for the elaboration of suggestions aiming the overcoming of the above problems, especially regarding the change of civil registry.