Background: Bernard-Soulier syndrome (BSS) and Glanzmann Thrombasthenia (GT) are rare inherited platelet function disorders, defined by a permanent history of mucocutaneous bleeding. The objective of this project was to identify biological and clinical characteristics of BSS and GT patients. Methodology: This study included 52 patients with bleeding disorders, the clinical, haematological and demographic features of patients were determined and the level of GpIIb/IIIa and GPIb/IX was assessed. Results: From a total of 52 patient, 20 were diagnosis with BSS (9 females and 11 males), their age range from 6 to 42 year and 23 diagnoses with GT (10 females and 13 males), their age range from 4 to 50 year. Epistaxis, easy bruising, menorrhagia and ecchymosis were the most frequent symptoms. Prolonged bleeding time (BT), normal PT and PTT were seen in all cases. Variable thrombocytopenia, large platelets with decreased GPIb/IX level were seen in BSS patients, while the level of GPIIb/IIIa was decreased in GT cases. Conclusion: Since BSS and GT are infrequent disorders diagnosis may be postponed, both diseases are combined with crucial bleeding tendency, therefore earlier detection would have been important for patients management.