A blood storage container includes a container main body made of a resin composition incorporating, per 100 parts by mass of polyvinyl chloride, 30 to 70 parts by mass of a composite plasticizer combining a first plasticizer and a second plasticizer, the first plasticizer being di-isononyl-cyclohexane-1,2-dicarboxylate, the second plasticizer being a citrate, the blending ratio between the first plasticizer and the second plasticizer in the composite plasticizer being 15/85 to 93/7.
