Marco Antônio de Oliveira Maciel (born Recife, 21 July1940) is a Brazilian politician. He is a lawyer and a law school professor. He was a founder of the centre-right PFL party, former ARENA and was twice elected vice-president in the same ticket as center-left social-democratic President Fernando Henrique Cardoso, in 1994 and 1998. He served the entire term of office, from 1 January1995 to 1 January2003.
Before vice presidency he was chairman of the Chamber of Deputies from 1977 to 1979 and Governor of his home state, Pernambuco, between 1979 and 1982. He is currently a senator of Pernambuco.