We analysed the usage of neonatal blood components in pediatrics at Samsung Medical Center from January 1998 to March 2001. The 3,236 unit neonatal blood components were prepared. For pediatric and neonatal transfusion, it is important to supply the small volume needed. Newborns, compared to adult, require transfusion more frequently, which increases donor exposure and donor related risks such a hepatitis. The authors experienced the use of neonatal blood bags for pediatric units of red blood cell in the blood bank, Samsung Medical Center from January 1998 to March 2001.