María José Martínez Sánchez (born 12 August, 1982 in Yecla, Murcia, Spain) is a professional tennis player from Spain. In singles, Martínez Sánchez has won two WTA singles titles, at the 2009 Copa Sony Ericsson Colsanitas and the 2009 Swedish Open. She was also a runner-up at the 2008 Barcelona KIA. As a junior she won the 1999 Orange Bowl, a year-ending tennis event for junior players. She reached heer career high ranking in singles of World No. 30 on November 2, 2009.

In doubles, Martínez Sánchez has won twelve WTA doubles titles, including the 2009 WTA Tour Championships with Nuria Llagostera Vives. She has also won four titles with Anabel Medina Garrigues. Martínez Sánchez reached a career high ranking of World No. 5 on November 2, 2009.

As a Junior, Martínez Sánchez won the 1999 Orange Bowl, a year-ending tennis event for Juniors. At the 2008 Wimbledon Championships, she advanced to the third round where she lost to eventual champion Venus Williams.