The Serbian Revolutionary Organization () or Serbian Chetnik Organization (Српска четничка организација / Srpska četnička organizacija) was a revolutionary organization with the aim of liberation of Old Serbia (Kosovo and Macedonia) from the Ottoman Empire (in the vilayets of Kosovo, Manastir and Salonika). Its Central Committee (Централни одбор / Centralni odbor) was established in 1902, while the Serbian Committee (Српски комитет / Srpski komitet) was established in September 1903 in Belgrade, by the combined Central Boards of Belgrade, Vranje, Skopje and Bitola. Its armed wing was activated in 1904. Among the architects were members of the Saint Sava society, Army Staff and Ministry of Foreign Affairs. It operated during the Struggle for Macedonia (Борба за Македонију / Borba za Makedoniju), a series of social, political, cultural and military conflicts in the region of Macedonia; its operations are known as Serb Action in Macedonia (Српска акција у Македонији / Srpska akcija u Makedoniji).