Fojnička River is a left tributary of the Bosna in Bosnia and Herzegovina. It flows for 46 kilometres with a basin area of 727 km2. The Željeznica and the Lepenica are tributaries of the Fojnička River. It is among the last remaining sanctuaries for huchen in the Bosna river basin, the others being the Krivaja, and possibly the Lašva and the Željeznica.