The last military dictatorship in Argentina was characterized by gross and systematic human rights violations. After the restoration of democracy in 1983, President Raúl Alfonsín put the military juntas on trial. Criminal prosecution of the abuses was later halted through laws and decrees. In 2003, under the Néstor Kirchner administration, the trials were resumed and some of the sentences incorporated the idea that the crimes had been committed in the framework of genocide. This article reconstructs the history of the uses and re-significations, furthered by local and transnational actors, of the category of genocide and the ways in which it was incorporated to characterize the crimes committed by the Argentine dictatorship. I argue that the use of this category shows the long presence of the Shoah paradigm in the country and the adoption of the international framework of human rights by actors involved in pro-accountability and memorialization processes.