The set of Palaeolithic and Mesolithic artefacts from Aukštumala consists exclusively of flint manufactured items. This paper presents exhaustive data on studies of the flint artefacts, and on the reconstruction of their manufacture technique, based on observable characteristics of their manufacture. The functions of the artefacts found in the settlements were established at the Archaeological Material Research Laboratory at Klaipėda University, by means of an Olympus SZX16 microscope, and simultaneously their typology and the chronology of individual items were revised.