Iustin Ştefan Frăţiman (June 1, 1870, Cuhureştii de Jos - September 23, 1927, Cuhureştii de Jos) was a historian and activist from Bessarabia. He was a corresponding member of the Romanian Academy (after June 7, 1919) and an activist of the National Moldavian Party. Iustin Frăţiman graduated from Kazan State University and Petersburg University. He was the president of the "Literary and Historical Society B.P. Haşdeu" in Chişinău (after April 1, 1918).