This study discusses the trajectory of the Reintegration Movement of People Affected with Hansen s Disease (Movimento de Reintegração das Pessoas Atingidas pela Hanseníase - Morhan) in its battle for citizenship rights for people suffering from leprosy, seen through the analytical reference of José Murilo de Caravalho s classic work on the building of citizenship rights in Brazil. The academic relevance lies in studying Morhan s characteristics: a predominantly urban, nationwide movement representing marginalized and stigmatized social forces. Furthermore, this study discusses a recent aspect of Brazil s political history, which is the great mobilizing and articulating ability of a social group in the battle for civil, political and, above all, social rights. However, approaching a social movement with such magnitude is beyond a description of a form of manifestation of a stratum of Brazilian society. Different fields of knowledge should undoubtedly try to capture effects that exist and will continue to exist in the future, beyond official history, the essence of these people s painful memories. And they are doomed to oblivion because, alas, people who survived compulsory isolation, and who are a living memory of the adversities of an inconsequential hygienist policy, are dying. It was a great challenge to conduct this study because it required describing and analyzing the organization of an association fighting for a cause that was first and foremost the preservation of life and now, twenty years after its creation, still collects triumphs of Brazilians who affirm their position as citizens and who have become visible in different parts of the world. In the final analysis, Morhan can be mostly said to be an urban social movement fighting for citizenship rights of people suffering from leprosy. This battle places more emphasis in the field of social rights, since this is Morhan s more recent albeit more intense battle. Truthfully said, the movement has pined for social rights since the beginning of its trajectory; however, our research only perceived the materialization of this battle for social rights as a recent phenomenon, particularly after the 1990 s. Moreover, is important to emphasize that to our surprise, the other rights, civil and political, were also highlighted in the path of struggle of Morhan, particularly political rights. This led us to believe that a social movement such as Morhan distinguishes vitality in Brazilian society in its battle for citizenship rights.