The recent research was managed to make an inquiry about influencing dietary fructo-oligosaccharide (FOS) on providing food supplements and growing procedure of common carp Cyprinus carpio fingerlings. The fingerlings were adapted for 3 weeks and then reared in triplicate groups in 15 tanks (n = 4 fish per tank with average initial weights of (40 ± 3.00 gm). The fish fed on experimental diets containing different levels of fructo-oligosaccharide (FOS); (0, 2.5, 5, 7.5, 10 gm FOS /kg diet) for apparent satiation twice a day for 10 weeks. Results showed that final weight, weight gain, daily growth rate, relative growth rate, and specific growth rate were significantly (P<0.05) increased with 10 gm FOS /kg diet compared to the other groups. While, food efficiency ratio and protein efficiency ratio were significantly higher (P<0.05) especially in group fed 10 gm FOS /kg diet (1.13 and 295.16) respectively compared to the other treated and control group. However, food conversion ratio in 0 gm FOS /kg diet (control) group was higher significantly (P<0.05) among other groups (1.63).