We carried out a Capture-Mark-Recapture study on Martino's vole Dinaromys bogdanovi on Mt. Bjelašnica, central Bosnia. During two trapping sessions (June and September 2008) we recorded 21 individuals which were captured 33 times. Voles were trapped significantly more frequently during the night (85% of all captures). In June all the animals were adult females while three age classes (juvenile, subadult and adult) were distinguished in September. No reproductive activity was recorded in mid-June and not a single adult female was evidently pregnant in September. Also, subadults (N = 6) did not show reproductive activity. Martino’s voles proved sedentary and only two individuals moved between trap stations. Ten adults were captured in two sessions on an area of 5.67 ha, resulting in a population density of about 2.5 voles per hectare.