Food remains of badger (Meles leucurus) was studies in 5 study areas in taiga, forest-steppe and steppe ecosystems of Urals and Western Siberia. Highest number of mammal species was observed in northern forest-steppe and southern taiga, minimal – in the mountains of the Southern Urals. In most study areas common field voles (genus Microtus) were dominant among mammals in badger diet. High proportion of juveniles among voles indicates that digging the burrows is for badger an important method of hunting the small mammals.