Diógenes Luna Martínez (born May 1, 1977) is a boxer from Cuba, who won the bronze medal in the light welterweight division (– 63.5 kg) at the 2000 Summer Olympics in Sydney, Australia. In the semifinals he was defeated by eventual runner-up Ricardo Williams from the United States. A year later he won the world title at the 2001 World Amateur Boxing Championships in Belfast, Northern Ireland.