Results of atmospheric leaching of copper sulphide concentrate from Lubin Concentrator (ZWR Lubin) with oxygenated aqueous H₂SO₄ and in the presence of Fe(III) have been presented. It was found that oxidative atmospheric leaching performed in acidified and oxygenated iron(III) solutions has to be preceded by a controlled, non-oxidative decomposition of acid-consuming carbonate components in order to further liberate finely disseminated metal-bearing minerals. Atmospheric leaching appeared to be a very efficient process for recovering Cu, Zn, Co and Ni from the Lubin concentrate due to favorable mineralogical composition and fine size of leached particles. A maximum recovery of Cu (95%), Zn (90%), Ni (40%) and Co (50%) was observed after 5-7 hours of leaching at 90°C in the oxygenated solutions containing 20-30 g/dm³ of Fe(III). The solid residue after atmospheric leaching will be further processed by flotation or chloride leaching to recover Ag, Pb and precious metals.