Secret Code LB 17 (German: Geheimzeichen LB 17) is a 1938 German thriller film directed by Victor Tourjansky and starring Willy Birgel, Hilde Weissner and Bernhard Minetti.

The film's sets were designed by the art directors Karl Böhm and Erich Czerwonski.

The authorities attempt to track down a terrorist group who have assassinated the Minister of War.

They soon begin to suspect they have a traitor in their own ranks.

This article related to a German film of the 1930s is a stub.