The Bulgar materials from the Idnakar settlement site in the territory of the Udmurt Republic, which had belonged to the local Finno-Ugric population, are considered. Over a long period of research in this hill-fort, a vast material was found and defined by a number of researchers as related to the Bulgars: potsherds, certain types of jewelry, household items and weapons, dating in general to the 10^th – 13^th centuries. A hypothesis concerning the presence of the Turkic component among the population of this fortified settlement is put forward. The problem of the Volga Bulgaria’s trade mission functioning in the Idnakar hill-fort is formulated. Idnakar, a major monument of the region, had played an important role in the Bulgar trade along the Kama trade route in the territory of the Udmurt Cis-Urals. It is assumed that the trading post could be set up inorder to conduct trade operations between the Bulgar northern outpost – the Rozhdestvenskoye complex in Perm Cis-Urals (ancient Afkula) and a more southern outpost – the Yelabuga fortified settlement in the eastern Cis-Kama area.