The artefact was found in 2018 near the Cultural Park in Powsin in Warsaw-Ursynów (Fig. 1) and transferred to the State Archaeological Museum in Warsaw. It is a boat-shaped stone axe made of amphibolite (Fig. 2–4). An indentation remaining after a drilled hole is located on its butt, while a circular trace left by a partially drilled hole can be found on its upper surface. The dimensions of the artefact are: length 90 mm, width at the butt 50 mm, width at the blade 20 mm, thickness 37 mm, diameter of the hole on the butt 15 mm, diameter of the partially drilled hole 14 mm. The axe belongs to subtype IB (reduced forms) in the typology of J. Libera and J. Sobieraj (2016, p. 414), associated with the early phases of the Corded Ware culture. This subtype corresponds to type B in the classification of P. V. Glob (1944, pp. 20–21), K. W. Struve (1955, pp. 15–16), and K. H. Brandt (1967, pp. 50–53) and type B2 after P. Włodarczak (2006, p. 33).