Lost Child 312 (German: Suchkind 312) is a 1955 West German drama film directed by Gustav Machatý and starring Inge Egger, Paul Klinger and Heli Finkenzeller.

The film's sets were designed by the art directors Dieter Bartels and Max Mellin.

Several years later she sees a picture in a paper and realises it is her own lost daughter.

In addition it turns out that Ursula's fiancée is not dead, but has been held as a Soviet prisoner of war.

Troubles over the legal case over the girl are ultimately settled, when he falls in love with the sister of Ursula's husband.