The analyzed coins belong to one of the most exciting categories of numismatic finds on the territory of Eastern Europe – they are copies of the Roman Empire denarii. In the Barbarian Fakers, Manufacturing and use of counterfeit Roman Imperial denarii in East-Central Europe in antiquity project, funded by the Poland National Centre of Science (2018/31/B/HS3/00137) and implemented at the Faculty of Archaeology, University of Warsaw, as part of which the present research is conducted, we have been tasked to determine chemical composition of samples associated with the production in the Chernyakhiv culture of cast copies of Roman denarii by the proton induced X-ray emission. The results of analysis showed that most of the samples are Cu-Sn-Pb three-component alloys. The zinc content does not exceed 5%, which means the absence of brass samples according to the classification of Roman copper alloys. Two samples from Vinnytsia region and Khmelnytsky region are silver.