The effect of graded levels of toasted Adenanthera pavonina seed meal (TAPSM) on haematological and biochemical indices of finisher broiler chickens was investigated in a five-week feeding trial with 84 (5-week old) broilers divided into four groups of 21 birds per group. Each group had three replicates of 7 birds. Four experimental diets were formulated to contain 0, 10, 20 and 30% TAPSM, represented as T₁, T₂, T₃ and T₄ respectively. Birds were allocated to the four diets in a completely randomized design and housed in a deep litter pen. Feed and water were offered to birds ad libitum. Haematological parameters showed a significant (P<0.05) decreasing trend in haemoglobin (10.20, 9.03, 8.60 and 7.63 g/dl), packed cell volume (28.33, 26.10, 25.60 and 25.20%), total red blood cell (4.23, 4.00, 3.99 and 3.99 ×10⁶/µl), mean corpuscular volume (66.97, 65.25, 64.16 and 63.15 fl), mean corpuscular haemoglobin (24.11, 22.57, 21.55 and 19.12pg) and mean corpuscular haemoglobin concentration (35.66, 34.59, 33.59 and 30.27%) with an increase in the level of TAPSM in the diets. Total white blood cells (71.76, 73.40, 75.07 and 76.17 ×10³/µl) increased significantly (P<0.05) as the TAPSM level increased. The other values were as follows: urea (4.00, 5.00, 6.67 and 10.00mg/dl), creatinine (0.33, 0.25, 0.43 and 0.46mg/dl), cholesterol (149.67, 135.67, 113.67 and 102.67 mg/dl), total protein (3.33, 3.43, 2.97 and 2.50mg/dl), glucose (146.14, 208.49, 179.66 and 135.33 mg/dl), alkaline phosphatase (105.65, 111.2, 132.67 and 145.00 iu/l) and aspartate transaminase (68.68, 70.00, 78.00 and 85.67 iu/l). In conclusion, 10% TAPSM in broiler diets most favourably influenced haematological and biochemical parameters.