The aim of this work was to evaluate some haomatological parameters in growing male and female quails. Thirty five male and 35 female, 1 to 8 week-aged Japanese quails were used in this study, Haematological examination were carried out in 5 male and 5 female quails at 1 st, 2 nd, 3 rd 4 th, 5 th, 6 th and 8 th week of ages The red blood cell (RBC) counts, haemoglobine amounts (Hb) and hematocrit values (PCV)) in both groups increased significantly with increased age (P< 0.05). The RBC, Hb and PCV were found higher in male than female in all the age periods. The RBC was significantly higher in males (3.65X 10⁶) than females (3,28x 10⁶) at 8 week of age (P<0.05). The white blood cell (WBC) and thrombocyte counts did not show evidently changes, whereas WBC In females (24-28x 10³) were found slightly higher than males (21 -26 x 10³) at all weeks, In the percentage of leucocyte types were not determined any differences between sexes during eight weeks and the lymphocyte percentages (57-70%) were drastically higher than heterophils (24-36%) in both groups. There was no differences between sexes in respect to the blood cell sizes where as RBC sizes were bigger in females than males at either 1 st and 8 th weeks. On the other hand, in sizes of thrombocyte and leucocyte types in both groups were not determined diflerences between 1 st and 8 th weeks, but RBC sizes at 8 th week in both groups decreased significantly as compared with 1st week (P<0.05). Plasma glucose, cholesterol and total protein levels in both sexes increased gradually until 8 th week and plasma glucose level in males and plasma total protein level in female were higher, without differences between sexes in all ages.