This dissertation is the result of a research initiated during the undergraduate course in Social Work at PUC-Rio, a period in which I participated for two years (2017-2018) in the Institutional Program for Scientific Training Grants (Pibic) of the National Council for Scientific and Technological Development (CNPq). Its objective is to contribute to give more visibility to the historical legacy of human rights violations practiced during the 1964-1985 dictatorial regime, examining in particular the violations suffered by social workers and Social Work students who were engaged in the fight against the established regime. in 1964, in Brazil. For this, information contained in documents found in the databases of the Reference Center for Political Struggles in Brazil (1964-1985) - Memórias Reveladas, of the National Archives, and of BNM - Brasil Nunca Mais Digital was presented and analyzed. In addition to these procedures, we work with testimonies from social workers who experienced the period and who were targets of repression. The Brazilian military dictatorship was instituted by a coup d etat on April 1, 1964, using exceptional instruments to persecute, arrest, torture and kill anyone who opposed the regime. In the period, the violation of human rights was institutionalized, on a large scale, through the publication of Institutional Acts (AI) that legalized the political actions of military governments. Built on the argument that the AI aimed to combat corruption and subversion, between 1964 and 1969, 17 institutional acts were decreed with 104 complementary acts, which gave the Executive almost absolute power. Resistance to the regime counted on the participation of Brazilian students, intellectuals, artists and workers. Thousands of people were arrested and tortured, hundreds were killed, always for political reasons. Many of them are still missing today. Among the people persecuted by the regime, there were social workers and Social Work students, which is why this study addresses themes related to the Brazilian military dictatorship, placing Social Work in the period, because in the same period the profession lived the Reconceptualization Movement, manifesting the purpose to break with the theoretical-methodological origins of conservative and positivist thinking and with purely interventionist and reformist standards, bringing representative changes in the theoretical and practical field of the profession. Thus, we seek to analyze, through the documents and testimonies found, how social workers and students of Social Work were dealing with these transformations and with the resistance struggles against the authoritarian regime.