The Appeal to Conscience (German: Ruf an das Gewissen) is a 1949 German mystery film directed by Karl Anton and starring Karl Ludwig Diehl, Werner Hinz and Gustav Diessl. It was originally shot in 1944, but remained uncompleted until it was finished by DEFA in the post-war era. It remained unreleased until it was given a 1949 premiere in Austria. Subsequently it was distributed in East Germany in 1950 and West Germany in 1951.

It was produced by Tobis Film, one of the dominant companies of the Nazi era. It was shot in Studios in German-occupied Prague, with some location filming taking place around the city. The film's sets were designed by the art directors Gustav A. Knauer and Fritz Lück.