The Author explores the relationship between Pentecostal growth and the daily experience of violence in some favelas in Rio de Janeiro. Analyzing the languages that have guided the enormous national and global spread of the Pentecostal and neo-Pentecostal churches, and considering the testimonies of some former narcotransactors converted to Pentecostalism, the Author highlights some specificities in the expansion of these churches in the favelas cariocas.