Renal failure is associated with a defect of blood coagulation from a variety of causes, particularly of platelet dysfunction. The prospective study of 12 ESRD patients undergoing renal allograft was conducted to determine the utility of TEG(thromboelastography) versus standard coagulation tests(prcthrombin time, partial thromboplastin time, fibrin degradation product, fibrinogen, and platelet count) The abnormal pararneters of TEG during the operation of renal transplantation could not be identified in the most of cases. The significant changes including shortened R time(reaction time) and the increased MA(maximal amplitude) were noted after the transfusion of fresh frozen plasma. The results of the standard coagulation tests on each steps of the operation were also within normal limit.