The Unfaithful Eckehart (German: Der ungetreue Eckehart) is a 1931 German comedy film directed by Carl Boese and starring Ralph Arthur Roberts, Fritz Schulz and Paul Hörbiger. The film is based on the play of the same title by Hans Stürm. It was remade in 1940. A silent film was made by Reinhold Schünzel in 1928 under the title Don Juan in a Girls' School.