Marco Antônio de Oliveira Maciel (21 July 1940 – 12 June 2021) is a Brazilian politician, lawyer and law school professor. He was the 22nd Vice President of Brazil from January 1, 1995 to December 31, 2002. He worked alongside President Fernando Henrique Cardoso in the 1994 and 1998 general elections.
He was a founder of the conservative PFL party, former ARENA. Marco Maciel was married to Ana Maria Maciel and had three sons. He was also a practising Roman Catholic.
Maciel died on 12 June 2021 from multiple organ failure caused by COVID-19 in Brasília at the age of 80.