Venous thrombosis is a very rare occurrence in patients with hemophilia A. We present a one year old child with severe hemophilia A, who developed deep vein thrombosis in antecubital fossa following venous obstruction due to bleeding around the vein. We didn't start anticoagulant therapy to our patient because of the risk of further bleeding into subdural hemorrhage he had already developed. We could manage the thrombosis and save the limb by relieving the obstruction with replacement of factor VIII.