Natural lakes are rare phenomena whithin the extraglacial areas of Central Europe. Moreover, most of them was terrestrialized during the course of Holocene. One of them was former lake Švarcenberk. From this lake was taken part of sediments, which was studied using remains of head capsules of chironomid (Diptera: Chironomidae). Chironomidae are used as biological indicators for paleolimnolical researches, because their remains are well preserved in the sediment. Eighteen samples from 360 to 660cm of the sediment core were analysed. Samples represent Younger dryas and early Holocene. The main aim of this study was find out how profundal midges reacted to change of their environment from the Younger Dryas to early Holocene. There were identified 42 taxa in the core (from subfamilies Tanypodinae, Chironomidae, Orthocladinae). Midges from subfamilie Chironomidae were dominat in most of samples. In the end of Younger Dryas oligothermal taxa were prevailed. At the beginning of Holocene, we can see increase taxa of the chironomid, which indicate warmer climate and live in eutrophic lakes. We can also see increase of taxa, which depend on macrophytes. Chironomids reacted to temperature, tropic status and water level changes. Our results supported that some change in chironomid stratigraphy reflect climatic variability.