In this study, 176 day-old male broiler chickens (Ross strain) were allocated to four treatments with four replicates (11 in each replicate) in a completely randomized design to evaluate the effect of sunflower seed meal on body organ weight and blood parameters of broiler chicks for 7 weeks. Treatments were 0, 7, 14 and 21 percent of SFSM for starter (1-21 days) and grower phases (22-49 days). The starter phase diets were calculated to contain 20.86% CP and 2900 kcal of ME per kg of diet. They also contained 18.75% CP and 3000 kcal of ME per kg of diet for the grower phase. At 28 days of age, blood samples were collected from chicks. At the end of the experiment (49 days), one bird from each replicate was slaughtered to study the relative weights of liver, abdominal fat, gizzard, thigh, breast and gastrointestinal tract. The results of the present study indicated that triglyceride and LDL concentrations decreased significantly and HDL concentration increased (P<0.05) in the birds fed increasing levels of SFSM but the activity of alkaline phosphatase and the levels of calcium, phosphorus, glucose and protein in serum were not affected by the treatments employed. The relative weight of the breast, thigh, liver and abdominal fat were not affected by the SFSM. However, the relative weight of gizzard and gastrointestinal tract were increased significantly (P < 0.05) in birds fed SFSM diets compared to those fed control diet. It is concluded that SFSM can be used in broiler chick diets and its high fibre content had no significant effect on body organ weight and blood parameters.

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