Spanish Republic Tuure Valdemar Lehén (28 April 1893 – 12 October 1976) was a prominent Finnish communist and later Finnish-Soviet politician as well as a philosopher, journalist and historian.

He first came to prominence by writing texts on mob fighting and strike tactics, and in 1926 married Hertta Kuusinen.

Lehén also fought in the Spanish Civil War and was among the chief of staff of the International Brigades.

He served as Minister of Internal Affairs in the People's Provisional Government unsuccessfully orchestrated by the Soviet Union for Finland in December 1939.

[4] After the war in 1946, Lehén returned to Finland and continued his research work as the director of the publishing company Kansankulttuuri.