In Lithuanian archaeology, much attention is paid to the technologies of iron smelting and blacksmithing, and less to the findings of the iron smelting business. Therefore, the process of iron extraction is more often reconstructed in accordance with technology, not with the findings. In the 1st settlement of Lieporiai complex of archaeological monuments, a place for smelting iron as well as various other discoveries, that make it possible to reconstruct the process of iron smelting, were found. The aim of the article is to interpret all findings, related to iron smelting, found during the exploration of this settlement. The interpretation of the findings is based on laboratory research data, analogies from other studies on archaeological monuments and works by researchers from Lithuania and other European countries. The first findings, related to iron smelting in Lieporiai, were discovered in 1992, but their purpose only became clear in subsequent researches, as the number of findings kept increasing. The data of the research carried out show that iron in the 1st settlement of Lieporiai was melted in the 4-7 centuries A.D. In this settlement, the choice of the place where the iron was melted was determined by the iron ore deposit and the proximity of the forest. Hydrated iron ore was produced in Lieporiai. It was done in an open way by digging pits on the surface of the Earth. In 1992-2000, 18 iron ore pits, 4 wells, the water of which was used for washing the ore, as well as ore burning fireplaces and ore crushing tools were found and investigated. Charcoal was used for iron smelting. Ironworks were produced in special smitheries, using stone tools. What was made was weapons, tools and various other articles
