In this research, sex and age compositions, age-length, age-weight, length-weight relations, condition factors were investigated on 674 chub {Leuciscus cephalus L, 1758) specimens caught from Lake Tödürge, Sivas between April and November 1994. The age composition of L. cephalus specimens were between I-VH years and sex percentages were calculated as 68.25 % for females and 31.75 % for males. Determined minimum and maximum forklength values were 53 and 299 mm; weights were 1.5 and 347.1 g. Von Bertalanffy equations of L cephalus specimens as length-growth and weight-growth were established as $L_t=474.19 [1-e^{-0.10608(t+0.3805)}]$ for females; $L_t = 545.26 [1-e^{-0.O7919(t+0,7563)}]$ for males and $W_t=l565.39[1-e^{-0.10608(t+0.3805)}]^{3.0964}$ for females and $W_t = 2287.67[1-e^{-0.07919(t+a7563)}]^{3.0376}$ for males. Length-weight relationship were found for female and male specimens as W= 0.0101 $L^{3.0964}$ and W= 0.0121 $L^{3.0376}$, respectively. Average condition factor values were estimated as 0.81 for females and as 1.07 for males. According to findings; sexual maturity age of female and male L cephalus specimens were III-IV and II-III, respectively.