The reflections in the thesis Being black in the metropolis of nonbeing are the result of an old claim (or a long-standing discontent). In this case, the proposal recognizes the black experience in the metropolis of Rio de Janeiro as a postulate endowed with a series of interdictions. This perception ran through part of my education, but was only consolidated through the maturing of theoretical and subjective aspects. The following stand out as elementary methodological structures for the discussion: the long duration; the materialization-substruction-projection triad; the semantics of the vertiginous whole and the imbrication between presences that are filled with absences in the midst of the production of space. This basis makes it possible to articulate the perspective in different spatio-temporal designations, a fundamental dynamic for abstraction and for arriving at the object of the work, which contemplates the racial issue in the midst of the production of space in urban daily life in the current period, characterized by its military fruition and explicitly forged by metropolization. The work therefore highlights the objection to black-Brazilian corporeality and knowledge in the production of the city, a reality present in patrimonialization, in the public security policies of the new military urbanism and in the racist codes that condition the appropriation of the urban by black men and women, which echoes in their psychic content and in their own realization as a being.