The article contains a description of the brick-burning kiln, which was discovered during the 2012 excavations on the medieval Zhaiyk fortified site (Western Kazakhstan oblast). A similar object had been discovered on the site in 2002. Kilns of similar design were known on the vast territories of Southeastern Europe and Central Asia in the 10^th –15^th cc. In the 13^th –15^th centuries, they were widely spread in the territory of the Golden Horde. The analysis of their design, combined with written sources and ethnographic data, allows reconstructing the operation process of such kilns in general lines. The finds of kilns on the Zhaiyk settlement make it possible to suggest that in the 13^th –14^th centuries there existed a developed construction materials production in the territory of the settlement.