The Blue Fox (German: Der Blaufuchs) is a 1938 German comedy film directed by Viktor Tourjansky and starring Zarah Leander, Willy Birgel and Paul Hörbiger.

[1] It was based on a play by the Hungarian writer Ferenc Herczeg.

It includes the song Kann denn Liebe Sünde sein.

The film's sets were designed by the art director Werner Schlichting.

Tired by her husband's lack of interest in her, due to his obsessive focus on his scientific study of fish, a Budapest woman flirts with the idea of running off with another man.