Karl Gustaf Idman (born 1 December 1885 in Tampere, died 13 April 1961) was a Finnish diplomat and a non-partisan Minister of Foreign Affairs in Antti Tulenheimo's cabinet in 1925. Idman completed a law doctorate in 1914 and worked in Helsinki University as a professor of international law from 1915 to 1917.Idman became an official in the Finnish Foreign Office in January 1918 after Finland gained independence. Idman belonged to the delegation which visited St.