Aspius aspius is one of the important commercial fishes in The Caspian Sea which them stocks was decreased because of overfishing and loss of spawning, so, in recent years catch amount of the fish reached to 400-500 kg. The purpose of this research was to reproduce this fish for restoring its fish stocks. For this purpose 30 fishes caught in the river Arass (northwest of Iran) and transported to the pond of 2000 m2 in 2015. The results showed that 20 fishes survived with 1+ to 2 age and average weight 1028.1 ± 93 and 1196.7±11 gr. Also, Female fishes were larger than male fishes in average weight. The results showed that in pre-brood stock that fed with natural food Weight gain Increased was 531 g in 1+ to 3+age group and 541 g in 2 to 4 age group.