PROBLEM TO BE SOLVED: To provide a porous body having a surface opening ratio and a pore diameter restricted to specified ranges, and to provide a porous body that can be advantageously used as a separation membrane or an adsorbent such as a blood component separation membrane of an artificial kidney or the like, since the porous body has an ultrafine and homogeneous porous structure with a pore diameter that can be controlled to a range from the order of nanometers to the order of micrometers.SOLUTION: The porous body essentially comprises polymethyl methacrylate, and has continuous pores with a pore diameter of 0.001 &mum or more and 500 &mum or less of the continuous pores and an opening ratio on at least one surface of 10% to 80%. There are also provided a separation membrane comprising the porous body, an adsorbent comprising the porous body, and a method for producing the porous body.COPYRIGHT: (C)2012,JPO&INPIT【課題】 表面開孔率および孔径を特定範囲に制御された多孔体を得ることを課題とし、本発明の多孔体は、ナノメーターオーダーからマイクロメーターオーダーに孔径制御可能な微細かつ均一な多孔構造を有することから、人工腎臓等の血液成分分離膜などの分離膜や吸着体として有用に用いることができる。【解決手段】 連続孔を有し、該連続孔の孔径が0.001μm以上500μm以下であり、少なくとも一つの表面の開孔率が10%以上80%以下であるポリメチルメタクリレートを主成分とする多孔体。該多孔体からなる分離膜。該多孔体からなる吸着体。該多孔体の製造方法。【選択図】なし
