The elk staff is a characteristic Stone Age artefact from the Baltic region. The most elegant specimens have been found in the Olenij Ostrov burial site and various Stone Age sites in Šventoji. In 2016, the use-wear of artefacts found in the Stone Age sites of Šventoji was studied microscopically under a magnification factor of 690. The research effort also resulted in the successful dating of one of the staves found at the third archaeological site of Šventoji. The article presents the results and findings of the study, supplementing what is already known about the artefacts.