The effect of probiotics bacteria Bacillus subtilis isolated from the intestine of common carp at two levels of concentration of 1×103, 1×106  CFU / ml (cells per ml) mixed with food by young fish carp (weighted average 56/54±1 g) were fed. Project was carried out in a completely randomized design with three replications for 8 weeks. Feed rate were done based on 2% of body weight and 2 times a day. Determination the length and weight of fish every 14 days once was carried out. At the end of the experiment, a group of fish that were given probiotic, growth and feed efficiency, such as weight gain, specific growth rate, protein efficiency were found a higher level and better feed conversion efficiency as compared to their diet without fish probiotics (p<0.05). The highest above indices was obtained at 1×106 CFU/ml per kg diet. Only viscerosomatic index did not display any significant difference among the treatments 1×103 CFU/ml compared to controls (P<0.05). The highest survival rate of young fish in the treatment 1×103  CFU/ml compared to controls was observed that this difference was significant (p<0.05). The results showed that the probiotic Bacillus subtilis to feed young fish common carp at a rate of  1×106  CFU / ml per kg diet has positive effects on the growth parameters and nutrition indices.