The slum leaving population create strategies for their maintenance in these environments. Far from stating that informality would be a solution to all slum problems, the present dissertation understands it as a functional practice. Contrary to it, land regularization is understood as of the properties legalization from informal areas. However, what is seen in most slums in Rio de Janeiro that received these projects, is a fragile deed delivered that does not guarantee the population permanence, when, in fact, there is an actual delivery. The theme proposed by this dissertation is Land Regularization in contrast to the urban informality found in the Rio de Janeiro slums. It has been analyzed urban informality as a differentiated urban planning, therefore, it should not be seen as a problem that can be solved by land regularization. In order to understand the inclusion of land regularization as a government program in Rio de Janeiro slums, three slums were studied as field of research: Rocinha, Cantagalo and Acari (Vila Rica and Vila Esperança), all with governmental insertion and different outcomes. Thus, in order to reach the main objective, we seek to deepen the main themes through bibliographical research, documentary survey of land regularization programs and interviews with community leaders, managers of local land regularization programs and government agents. We aim to deepen the theme of land regularization and its various aspects, observing the challenges faced to guarantee the population living in the slums the right to the city.