The performance and haematological profile of Japanese quails (Coturnix coturnix japonica) fed graded levels of neem (Azadirachta indica) leaf meal was determined. Four treatments: T0% (feed with zero supplementation of neem leaf meal), T5% (feed with 5% supplementation of neem leaf meal), T10% (feed with 10% supplementation of neem leaf meal) and T15% (feed with 15% supplementation of neem leaf meal) respectively, were utilized in a completely randomized design (CRD). One hundred and twenty (120) 3 weeks old unsexed grower Japanese quails were used for the performance study. At the end of the 35- day performance study the quails were decapitated and a set of 2ml blood samples taken from 3 quails per treatment into plastic tubes containing the anti-coagulant ethylene diamine tetraacetic acid (EDTA) for the determination of PCV, Hb, RBC, WBC, MCHC, MCH and MCV). Results revealed that quails of the T5% showed similar performance characteristics with their T0% counterparts. Similarly, quails of the T5% group showed superior haematological values in PCV, RBC and Hb. The major benefit of incorporating leaf meal as shown in the T5%, T10% and T15% groups was the zero mortality as compared to their T0% counterparts due to its non-deleterious effect. Therefore, incorporating leaf meals especially at the T5% will improve the profit margin of quail farmers.