The summer food of the sable Martes zibellina Linnaeus, 1758, inhabiting taiga forests near Mirnoe Field Station on Middle Yenisei, Siberia, was studied by the analysis of 136 scats. Microtinae rodents (mainly northern red-backed vole Clethrio- nomys rutilus) constituted 52.3% of biomass consumed by sables. Plant food (seeds of Siberian pine Pinus sibirica and berries of Vaccinium sp.) was also frequently eaten; they occurred in 79.4% of scats but constituted only 19.9% of biomass. Shrews, burunduks Eutamias sibiricus, birds and insects were supplementary food, however, these groups of prey formed totally about 25% of consumed biomass.