Based on comparative morphometrics and molecular genetic analyses for two key regions of mitochondrial DNA (cytochrome b and NADH dehydrogenase), a bat captured in the southern part of Primorskii krai, Russian Far East, was identified as belonging to a species new to Russia: Eptesicus pachyomus, which ranges from Iran to Korea. According to genetic data, the bat is allocated to a separate branch within the species, whereas morphometry showed it to be closer to the subspecies pallens. A detailed phylogeographic study within the species E. pachyomus is required to determine the subspecies reliably.