The aim of this study was to investigate the effect of different types of processed (toasted, autoclaved and extruded soybean) soybean meal and raw soya seed on feed efficiency, carcass traits and blood parameters in Japanese quails (Coturnix japonica). A total of 189, twelve days old male and female Japanese quails were randomly assigned to 9 treatments. The first group (control group) was fed the standard diet with soybean meal, and other groups (T2-T9) were fed 10 or 20% of raw (T2 and T3), autoclaved (T4 and T5) and toasted (T6 and T7) and extruded soybean (T8 and T9). The results indicated that these treatments had no significant effect on weight and percent of abdomen fat, carcass percent, breast percent and concentration of blood triglyceride. The results showed that the best and worst feed conversion ratio (FCR) was recorded in T3 and T9 groups respectively. Live weight, weight without feather, carcass weight, gizzard weight and concentration of iron (Fe) and triglyceride were significantly different between male and female birds, but in other traits no significant different (P>0.05) was observed. There was no interaction between treatments and sex of the birds in any studied parameters. In conclusion, the results of present study showed that increasing processed soybean in the diet up to 20% especially extruded soya improved birds feed efficiency. The consumption of raw soybean caused negative effects on feed efficiency.