The present invention as well as provide drug adsorbent material without cause foreign body reaction to recognize such as blood coagulation, it is possible to adsorb and remove the drug anticancer such a small amount, it provides a medical device with the drug adsorbent material. The produced polymer particles having a shape retention after swelling and swollen by absorbing the plasma components under the conditions of pH7 or more, and drug adsorption material using the polymer microparticles obtained. Also, as a drug adsorption material for drug delivery device, the use of this drug adsorbent material.本発明は、血液凝固などの異物認識反応を惹起させず、少量で抗癌剤等の薬剤を吸着除去できる薬剤吸着材料を提供するとともに、前記薬剤吸着材料を備えた医療器具を提供するものである。pH7以上の条件下で血漿成分を吸収して膨潤し、かつ膨潤後に形状保持性を有する高分子微粒子を製造し、得られた高分子微粒子を用いて薬剤吸着材料とする。また、薬剤投与装置等の薬剤吸着材料として、この薬剤吸着材料を用いる。
