The Unfaithful Eckehart (German:Der ungetreue Eckehart) may refer to:

The Unfaithful Eckehart (play), a play by Hans Stürm The Unfaithful Eckehart (1931 film), a German film directed by Carl Boese The Unfaithful Eckehart (1940 film), a German film directed by Hubert Marischka