Franciszek Ksawery Pruszyński (December 4, 1907 - June 13, 1950) was a Polish journalist, publicist, writer and diplomat. He was one of the most active and operative of Polish newspaper reporters.
He was born in Wolica Kierekieszyna–now in Ukraine–in Volhynia. After the Russian Revolution of 1917 his family settled in Kraków. A graduate of the Zakład Naukowo-Wychowawczy Ojców Jezuitów w Chyrowie in 1927, he studied law at Jagiellonian University. He joined the organization Myśl Mocarstwowa (Imperial Thought). His works first appeared in Dzień Akademicki and Civitas Academica. He specialized in medieval German law, taught by professor Stanisław Estreicher. In 1929 he was deputy assistant to Estreicher.
He travelled all over Europe contributing articles to the leading Polish papers. He joined the editorial board of the newspaper Czas from Kraków, first as a proofreader, then surveying the foreign press, and from 1930, author of a series of reports from Hungary. In 1932 he published his debut book, Sarajewo 1914, Szanghaj 1932, Gdańsk 193? (Sarajevo 1914, Shanghai 1932, Gdańsk 193?) about Gdańsk. In the 1930s he published in the magazine Bunt Młodych (Youth Revolt) and was a member of the young conservatives. He travelled in Palestine in 1933 reporting for the Vilnius weekly Słowo. His book on Palestine was published in October 1933, Palestyna po raz trzeci (Palestine for the Third Time). During the Spanish Civil War in 1936 he was a correspondent in Madrid and supported the Spanish Republican Army, staying at the famous Hotel Florida (Madrid), then also inhabited by the likes of Ernest Hemingway. He wrote about Spain in the book W czerwonej Hiszpanii (In the Red Spain), published in 1937 (translated to Spanish as En la España roja in 2007). Before September 1939 he reported from Gdańsk. His article was published in July 1939 on the first page in the special issue of Wiadomości Literackie dedicated to Gdańsk.