During the Brazilian military dictatorship human rights violations were institutionalized through Institutional Acts that legalized the political actions of military governments and gave the Executive branch almost absolute power to use exceptional instruments to persecute, arrest, torture and kill opponents. Resistance to the regime included the participation of Brazilian students, intellectuals, artists, and workers. Many people were arrested and tortured, hundreds were killed por political reasons, and many still remain missing. The repressive system made no distinction between men and women, except in relation to sexual violence which was most most prevalent against women. Based on research into archival documents, testimonies, and a literature review, this article addresses Marilda Villela Iamamotos participation in the resistance to the dictatorship.