The dissertation seeks to analyze the role of popular lawyers with the advancement of social movements in Brazil. These professionals attained relevance with the transformations of the Constitutional Charter of 1988 and its effects on the emergence of new subjects and new rights in political matters. Also, the phenomenon of judicialization of politics, has been pivotal in making the law as a fierce battleground and symbolic struggles for the monopoly of translations and actions in the causes and repertoires (social capital), such struggles, which overflow in other social fields (political, cultural, etc.), redefining the role of these agents and their society projects and views, and rallying points of social movements. This work shall seek to understand who are these legal actors, what are their strategies of action, how they establish dialogues with social movements and finally, how they build a professional profile of militancy that is centered on the political and ethical commitments that guides their activism. To do so, this essay shall think the contribution of the dimensions of both utopian and the messianic tradition at the romanticism in the popular lawyer identities as a catalyst for political action surrounded by ideals of justice and emancipatory projects.