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Separate or combined effects of inulin and mannan oligosaccharide supplements on the growth, survival, body composition and salinity resistance of kutum roach (Rutilus frisii kutum) fry (410 ± 19 mg)  were investigated for 45 days in 40-liter tanks containing 30 individuals. Fish were fed 7 to 12% body weight with a commercial diet (35% protein and 12% lipid) supplemented with 0 (control), 5 g kg^-1 inulin, 5 g kg^-1 MOS and 2.5 g kg^-1 inulin + 2.5 g kg^-1 MOS in a totally randomized design trial in triplicate.  A general enhanced growth performance and feed efficiency were observed in fish fed on diet containing 5 g kg^-1 MOS (p<0.05). There were no significant differences in survival rate among treatments (p>0.05). NO significant difference was observed in body composition, but protein and lipid contents in the whole body increased in fish fed with 5 g kg^-1 MOS and control group. In general, the fish fed 5 g kg^-1 MOS had the highest survival index after 48 hours exposed to salinity stress (15 ppt). Results showed 5 g kg^-1 MOS could improve growth performance, survival and salinity stress resistance of kutum fry.