The influence of stocking density (1.5, 3 and 6 kg/m²) was investigated on weight, haematological and biochemical parameters of great sturgeon (H. huso) juveniles for a period of 8 weeks. After 8 weeks of rearing, the mean weight was 527.27±6.82g, 467.91±18.81g and 431.02±24.25g in densities of 1.5, 3 and 6 kg/m², respectively with no significant differences among treatments (P>0.05). A significant difference (P<0.05) was observed in haematocrit and eosinophil at treatment 1.5 kg/m²  on 30^th and 60^th day of rearing period, but the other haematological parameters including red blood cells (RBC), and lymphocyte, neutrophil and monocyte showed no significant effect with stocking density (P>0.05). WBC count showed significant increase in 1.5, 3 and 6 kg/m² at 60 day of the experiment. Cortisol and glucose increased significantly on day 30 at the level of 3 kg/m². Our results showed that rearing density had no major effect on the growth and some haematological parameters suggesting that great sturgeon exhibited lower stress responses to high stocking density. However, increasing stocking density exhibited significant effect on eosinophil, haematocrit and WBC count as well as cortisol and glucose.