The knowledge about stoneflies of the Balkan Peninsula is still not complete with many areas poorly investigated. During this investigation we collected adult stoneflies specimens from Kosovo, Albania, North Macedonia, Serbia and Montenegro during the period 2014-2018. In total we found 43 species belonging to 14 genera and 7 families. Four species are recorded for the first time from Kosovo (Leuctra cingulata Kempny, 1899, Nemoura cf. lucana Nicolai & Fochetti, 1991, Nemoura uncinata Despax, 1934 and Brachyptera macedonica Ikonomov, 1983), one is recorded for the first time from Serbia (Nemoura asceta Murányi, 2007) and one from Albania (Leuctra major Brinck, 1949). This investigation contributes to the distribution patterns of stoneflies species in the Balkan Peninsula.