The experiment investigated the effect of feeding sun-dried sweet orange (Citrus sinensis) fruit peel meal (SOPM) on pullet grower chickens using haematological and serum biochemistry parameters. Three hundred and sixty (360) birds were randomly allotted to five treatment groups of 72 birds and four replicates of 18 birds each. SOPM was used to replace maize at 0, 10, 20, 30 and 40% for diets designated T₁ (control diet), T₂, T₃, T₄ and T₅ respectively. The birds were fed ad libitum from 11 to 20 weeks of age (10 weeks). Blood samples were collected from the birds through the brachial (wing) vein at the 10th week of the trial for haematological and serum biochemical studies. The result of blood analysis revealed that dietary treatment had no significant (P>0.05) effects on all the haematological and serum biochemical indices assessed. It was, therefore, concluded that utilization of SOPM in the diets of pullet grower chickens did not cause any harm to the physiological process controlling these blood traits.