Guido Romanelli (Siena, 1876 – S. Vito al Tagliamento, 1973) was an Italian army officer. At the end of the First World War, Colonel Guido Romanelli became chef of the Italian Military Mission to Hungary from May to November 1919. At this time he was the only official representative of the Entente in Budapest and he intervened forcefully against the reprisals of the revolutionary government of Béla Kun, intervening to save the lives of cadets of the military academy of Ludovika who rebelled against the Bolshevik regime.