František Langer (3 March 1888 – 2 August 1965) was a Czech playwright, screenwriter, essayist, literary critic, publicist and military physician.

Their ancestor came to Bohemia in the mid-17th century as a court Jew (a Jewish financier who managed the finances of the nobility), brought by Cardinal Franz von Dietrichstein to his ironworks in Staré Ransko.

Shortly after graduation, Langer was drafted into the Austro-Hungarian Army and assigned as a lieutenant of the medical service to the Hucul Guard Regiment.

Subsequently, his regiment was sent to Russia, where Langer spent almost a year on the Galician front and participated in the Vistula River offensive.

In this capacity he took part in the Battle of Zborov and then in the Siberian Anabasis, when the Legions had to make a lengthy return to their homeland across Siberia.