This thesis aims to study the relationship between the artistic activities in prison, the sociability issues and the daily life of its producers as political prisoners. Taking the period ranging from 1969 to 1979 as a chronological cut, the research examines the experiences of inmates in different institutions in the city of São Paulo: Presídio Tiradentes, Complexo Penitenciário do Carandiru (Casa de Detenção and Penitenciária do Estado), Presídio do Hipódromo, and Presídio da Justiça Militar Federal. For this, several types of sources have been used in the research: artistic piece of works belonging to the collection Alípio Freire-Rita Sipahi and to other personal collections, documents written by political prisoners during the prison experience, documents prepared by the repressive agents on these inmates, art courses in prisons, newspaper news reports of the time, and memories of former political prisoners. Artistic production is perceived as a document-testimony, an expression that here means a historical document produced during a situation of political violence, working as a bridge between people and form of resistance. The activity developed in prison triggered different notions of resistance and showed different functions. At one point, it has also reflected disagreements between inmates and their political projects, however, on most occasions, it revealed the connection between political prisoners or between them and their support network outside the prison space.