At the beginning of the 1980s a single find of a flint dagger was made in Brzoza (northern Kuyavia, Poland). The dagger was investigated in terms of raw material profile, typological, technological and use-wear analyses. It has been established that it was made of the Scandinavian Cretaceous flint and may be classified into the subtype VIA (Lomborg 1973) or subvariant BBII2a (Libera 2001). The chronology of the dagger tends to be placed to the end of the Early Bronze Age or the beginning of the Older Bronze Age in Poland (ca. 1700-1500 cal BC). By means of the use-wear analysis, diversified and well-developed usage traces were recognized on the surface of the dagger. Some of them resulted in an obverse and inverse retouch what is indicative of a secondary treatment. Here it appears that the dagger from Brzoza may be considered as an import from the western-Baltic production centre. Before deposition act was done, the dagger had been frequently used also as a strike-a-light.