PROBLEM TO BE SOLVED: To provide a separation membrane for blood treatment, excellent in blood compatibility even when performing radiation sterilization under atmosphere and in a dry state.SOLUTION: The separation membrane for blood treatment comprises: a separation membrane having a polysulfone-based polymer and polyvinyl pyrrolidone； and a coat disposed on a surface of the separation membrane, and including polymethoxy ethyl acrylate (PMEA).SELECTED DRAWING: Figure 1【課題】大気下、ドライ状態で放射線滅菌しても血液適合性に優れる血液処理用分離膜を提供すること。【解決手段】ポリスルホン系高分子とポリビニルピロリドンを含有する分離膜と、該分離膜の表面に設けられ、ポリメトキシエチルアクリレート（ＰＭＥＡ）を含む被膜と、を有する血液処理用分離膜。【選択図】図１
