The article describes the results of research on the species composition, biodiversity and ecology of terrestrial mollusks of the Kirtashtov Mountains. As a result of the research, the following conclusions were drawn. In the Kirtashtov Mountains, 12 species of terrestrial mollusks belonging to 7 families and 9 genera were found. Of these, the Monacha cartusiana was first recorded in the study area. Twelve species of terrestrial mollusks have been identified in the Kirtashtov Mountains. The biodiversity of mollusks is high on the southeastern slope, with rust on the northeastern slope due to abiotic factors and vegetation cover. Mollusks were divided into ecological groups according to their biotope (4), stations (6), and feed (3).