Luiz Mattar (born August 18, 1963 in São Paulo) is a former professional tennis player from Brazil. He played on the professional tour from 1985–1995, during which time he won seven top-level singles titles and five tour doubles titles. Mattar's career-high rankings were World No. 29 in singles (in 1989) and World No. 55 in doubles (in 1991). His career prize-money totalled $1,493,136.