Marta Flantz, also spelled Flanz[1] (1885 – 1938) was a Polish German-speaking actress and film director.

[4][5] Together with Nina Niovilla,[2][6] Stanisława Perzanowska (co-director of Jego wielka miłość; 1936)[6] and Wanda Jakubowska, she was one of four women who directed full-length feature films in the interwar Poland.

[8] Flantz, together with Bolesław Land, wrote the screenplay for Prokurator Alicja Horn (1933), based on the novel by Tadeusz Dołęga-Mostowicz.

[9] Two years later, she was the sole director of the romantic comedy Kochaj tylko mnie produced by Leo-Film.

The main roles were played by: the debutante Lidia Wysocka, Kazimierz Junosza-Stępowski, Michał Znicz, Witold Zacharewicz and Helena Grossówna.