This study was carried out to determine the effect of storage on blood for a period of 32days,using the following haematological indices, packed cell volume, white blood cell and platelet count. A total of 25 whole blood were collected from apparently healthy blood donor, and haematological indices were estimated using the following storage duration. day 1, 7, 14, 21 and 32. The results obtained showed significant progressive decrease in haematological indices with the duration of storage (P<0>