In 2000-2001, the fauna of and ecological conditions in the Železna jama cave near Dob in the isolated karst area of Domžale-Moravče (east of the town of Domžale, central Slovenia), were investigated. Fifty-three species were found in the cave, the dominant ones being Meta menardi, Amilenus auriantiacus, Troglophilus neglectus, T. cavicola, Laemosthenes schreibersi, Ceuthmonocharis robici, Limonia nubeculosa and an undetermined phorid species. The troglomorphotic taxa found were: Zospeum sp., C. robici, Anophthalmus sp. among others. Besides seasonal changes in the local and the cave climate, changes in drought intensity and the varying quantities of organic matter in the substrate were probably the most important factors triggering migrations. Animals migrated between the cave and the surface, adjacent fissure systems and the water channel in the bottom of the cave, which is inaccessible to humans.