PROBLEM TO BE SOLVED: To provide a radioactive substance absorbent for inexpensively and efficiently and easily collecting and removing a radioactive substance which has scattered or drained due to an accident in a nuclear facility, a device for manufacturing the radioactive substance absorbent, a decontamination method for removing a radioactive substance by using the radioactive substance absorbent and a bag body for storing the radioactive substance absorbent.SOLUTION: Disclosed is a radioactive substance absorbent obtained by mixing fibrillated cellulose as a fibrously fibrillated and humidified water permeable high molecular substance derived from plants and zeolite as particulate inorganic porous crystal.【課題】原子力施設などの事故等で飛散または流出した放射性物質を、低コストで効率的に、かつ容易に捕集、除去するための放射性物質吸収剤、その製造装置、その放射性物質吸収剤を用いて放射性物質を除去する除染方法およびその放射性物質吸収剤を収納した袋体を提供すること。【解決手段】繊維状に解繊し、加湿した植物由来の浸水性高分子物質である解繊セルロースと、粒子状の無機多孔結晶であるゼオライトと混合した放射性物質吸収剤である。【選択図】図１
