Marcel Wenceslau Ferreira (born January 17, 1981, in São Paulo) is a Brazilian taekwondo practitioner, who competed in the men's flyweight category. He pocketed both a Pan American and South American titles in his own division, picked up a bronze medal at the 2007 World Taekwondo Championships in Beijing, China, and represented his nation Brazil at the 2004 Summer Olympics. Ferreira is also the elder brother of taekwondo jin Márcio Wenceslau, who later competed in the same category at the 2008 Summer Olympics in Beijing.