This applied work study, assessed by a qualitative method and deductive approach, uses a documental and bibliographical survey to discuss the fundamental right of the exercise of the citizenship by people with intellectual disability, having the Cultural Relativism as its instrument of strengthening. It aims to display the formal and abstract vision of the universality of the Human Rights, the disrespect by the Brazilian State and other determining reasons for the Convention of the Rights of Persons with Disabilities ineffectiveness, in order to fight discrimination and to promote the achievement of the exercise of citizenship by people with intellectual disability.