PROBLEM TO BE SOLVED: To provide a hollow fiber membrane for blood processing, capable of reducing erroneous leak determination and fixing of the hollow fiber membranes to each other while maintaining high membrane performance, and a hollow fiber membrane type blood processing device using the hollow fiber membrane.SOLUTION: In the hollow fiber membrane for the blood processing contains a hydrophilic polymer and a polysulfone-based resin, the content percentage of the hydrophilic polymer in the whole hollow fiber membrane is in the range of 2 mass% or above and 10 mass% or below the abundance ratio of the hydrophilic polymer in the inner surface of the hollow fiber membrane is in the range of 40 mass% or above and 100 mass% or below and the ratio of the abundance ratio of the hydrophilic polymer in the inner surface of the hollow fiber membrane to the content percentage of the hydrophilic polymer in the whole hollow fiber membrane is in the range of 8.0-50.COPYRIGHT: (C)2012,JPO&INPIT【課題】 高い膜性能を維持しつつ、リーク誤判定及び中空糸膜同士の固着を低減できる血液処理用中空糸膜、及び、当該中空糸膜を用いた中空糸膜型血液処理器を提供すること。【解決手段】 親水性高分子とポリスルホン系樹脂とを含む中空糸膜であって、中空糸膜全体における親水性高分子の含有率が2質量%以上10質量%以下であり、中空糸膜の内部表面における親水性高分子の存在率が40質量%以上100質量%以下であり、中空糸膜全体における親水性高分子の含有率に対する、中空糸膜の内部表面における親水性高分子の存在率の比が、8.0以上50以下である血液処理用中空糸膜。【選択図】 図3
