Ailton Guimarães Jorge (Rio de Janeiro, 24 November 1941), better known as Capitão Guimarães, is an illegal lottery operator (bicheiro) and the patron of samba school Unidos do Viradouro. He has been the president of the Independent League of Samba Schools of Rio de Janeiro (LIESA) from 1987–1993 and 2001-2007. An armed forces officer during the period of the military dictatorship, he is accused of participating in torture proceedings against political prisoners. After leaving the Army, he became a banker of the Jogo do Bicho.