Josip Štolcer-Slavenski (Serbian Cyrillic: Јосип Штолцер-Славенски; 11 May 1896 – 30 November 1955 ) was a Croatian composer and professor at the Music Academy in Belgrade. British musicologist Jim Samson described Štolcer-Slavenski as "undoubtedly one of a very small handful of truly major composers from South East Europe in the first half of the twentieth century".