Born and raised in the
Province of Brescia, Bontacchio made her debut with C.F. Cibus of
Rodengo-Saiano in 1974. The team was
promoted to
Serie A in 1976 and later changed its name to C.F. Matra. After a season with Milan in 1980, Bontacchio spent three seasons with Alaska Lecce from 1981 to 1983, winning three
Scudetti and the
Coppa Italia twice. In 1984 Lecce were merged with
Trani and Bontacchio remained with the club until it folded in 1988, winning three more
Scudetti and another Coppa Italia. ==International career==