The reproduction of a population of Leuciscus cephalus orientalis in Savur Stream, a branch of the Tigris River in the south-eastern Anatolia, was studied. This subspecies has a spawning period extending from May to late June. Male and female become sexually mature at the second and third year of their life-span, respectively. The number of eggs was ranged from 2,050 to 20,140. Fecundity (F) was significantly correlated with fish length (FL), fish weight (W), and gonad weight (GW). Fecundity increased at a rate less than that of body weight and gonad weight, in relation to length.