A CPD-triple bags for 200ml whole blood were produced and one satellite bag (150ml) for storage of platelet concentrate (PC) was made of PVC sheet which was glow-dicharged in the presence of H2 gas for the prevention of plasticizer (DEHP) leakage. PC was prepared routinely and then stored in the satellite bag. The functions of the stored platelets were measured on ADP-, collagen-, ADP+ collagen-induced aggregability, shape change ability and hypotonic shock response (%HSR). The decrease of aggregabilities was the same as that of platelets stored in a bag from which DEHP leached. The shape change ablity and %HSR, however, did not decrease at all. It was comformed that the glow discharge-treated bag is a superior container for platelet storage.