Šventoji 43 is one of eight Comb Ware culture sites known in Lithuania at present. The site was excavated in 2013 and 2014 and revealed a homogeneous pottery assemblage, which was classified as Comb Ware and was radiocarbon dated to 3900–3650 cal BC. As a result of this dating, it has been found that Comb Ware is the oldest pottery type to have been produced in coastal Lithuania. In fact, the pottery assemblage of Šventoji 43 also suggests that Comb Ware originates from a distinct phase in the pottery sequence of coastal Lithuania that both predates all other phases from Šventoji pottery bearing sites and has not been previously recognised in other assemblages. Zooarchaeological analysis has revealed that the site was occupied during the early spring and mostly used for fishing zander and pike in the lagoonal lake and for hunting seals and forest game. The unique character of the flint industry, which combined hard hammer percussion and bipolar knapping that resulted in the production of microliths on irregular blades, suggests that the local Šventoji 43 community had Mesolithic roots. Furthermore, this evidence supports the hypothesis that Comb Ware had reached Lithuania through intense contact between East Baltic hunter-gatherers rather than due to a mass migration of the population from the Northeastern Baltic. The much wider distribution of Finno-Ugric hydronyms, compared to that of Comb Ware sites gives an impression that some other Subneolithic pottery types in addition to Comb Ware might have been produced by Finno-Ugric speaking people.