Bernard-Soulier Syndrome (BSS)is a rare hereditary disorder.Platelets in patients with BSS are unable to adhere, leading to an increased bleeding tendency. BSS cases are often misdiagnosed as idiopathic thrombocytopenic purpura (ITP). We report here a seven years old girl diagnosed as Bernard-Soulier syndrome with homozygous deletion of 39 nucleotides in the exon 2 of GP1BA. Bernard–Soulier syndrome should be considered before the patient is diagnosed with immune thrombocytopenia.