Luiz Fux (Portuguese pronunciation: [luˈis ˈfuks], born 26 April 1953) is a Brazilian judge and the current Chief Justice of the Supreme Federal Court. He is of Romanian Jewish descent, and the first Jewish Brazilian member of the Court. He was previously a minister of the Superior Court of Justice before assuming his position at the Supreme Court.
After graduating from the law school of the then-State University of Guanabara in 1976, Fux first served as an in-house counsel for Shell Brasil Petróleo Ltda. until 1978. From 1978 until 1982 he served as a prosecutor for the Public Prosecutor's Office of the State of Rio de Janeiro.
In 1983, Fux shifted his career to the Judiciary of the State of Rio de Janeiro as a judge of law, having achieved first position overall in the competitive bar examination. He was promoted by merit to the position of judge of law of the Entrância Especial, having been holder of the 9th Civil Court of the State of Rio de Janeiro.