Christian Giantomassi (born April 22, 1973 in Badia Polesine, Veneto) is a former professional boxer from Italy, who won a bronze medal in the lightweight division (– 60 kg) at the 1996 European Amateur Boxing Championships in Vejle, Denmark, alongside Vahdettin İşsever from Turkey. There he lost to Bulgaria's eventual silver medalist Tontcho Tontchev in the semifinals.