It has a (challenge) high membrane performance, can reduce the leakage false positives, excellent anti-oxidation performance and blood compatibility, elution and hollow fiber leak risk of hydrophilic polymer is low, priming is easy, there is a high permeability stability under harsh environment, I get a hollow fiber membrane for blood processing . (SOLUTION) is a hydrophilic polymer and the hollow fiber membranes for blood treatment containing a polysulfone-based resin and fat-soluble vitamins, hydrophilic with respect to the total weight of hydrophilic polymer and polysulfone-based resin in the entire hollow fiber membrane for blood treatment or less content A is 10 mass% 3 mass% or more of the hydrophilic polymer is a weight ratio of polymer to hydrophilic with respect to the total weight of hydrophilic polymer and polysulfone-based resin on the inner surface of the blood treatment the hollow fiber membranes is the ratio of the mass of sexual polymeric, hydrophilic existence ratio B of the polymer is at most 50 mass% to 35 mass%, the hollow fiber is the abundance of fat-soluble vitamins in the entire surface of the hollow fiber membranes for blood treatment membrane blood processing hollow fiber membrane is less than or equal to 1g per 0.5mg more than 25mg.(課題)高い膜性能を有し、リーク誤検知が低減化でき、抗酸化性能や血液適合性に優れ、親水性高分子の溶出や中空糸リークのリスクが低く、プライミングが容易で、過酷環境下での透過性能安定性が高い、血液処理用中空糸膜を得る。(解決手段)親水性高分子とポリスルホン系樹脂と脂溶性ビタミンとを含む血液処理用中空糸膜であり、血液処理用中空糸膜全体における親水性高分子及びポリスルホン系樹脂の合計質量に対する親水性高分子の質量割合である親水性高分子の含有率Aが3質量%以上10質量%以下であり、血液処理用中空糸膜の内表面における親水性高分子及びポリスルホン系樹脂の合計質量に対する親水性高分子の質量の割合である、親水性高分子の存在率Bが35質量%以上50質量%以下であり、血液処理用中空糸膜の全表面における脂溶性ビタミンの存在量が中空糸膜1gあたり0.5mg以上25mg以下である血液処理用中空糸膜。
