The Bastard () is a 1954 film of the classical era of Argentine cinema, directed by Lucas Demare, produced by Argentina Sono Film, and starring Tita Merello. The film won two awards at the eleventh Silver Condor Awards: Best Director and Best Actress, for Merello.
A woman married to a sailor must raise her own son and also the one her husband had with another woman. The two children are quite different from each other: the woman's son is sickly, while the other one is strong. She is thus inclined to claim motherhood of the strong boy and switches their identities. However, her biological son dies in a shipwreck, and the woman's guilt leads her to commit suicide.