Production method of the sponge of this invention, mixing the solution of process and prepare the solution of the polysaccharide substance process and the above-mentioned two which prepare the water soluble high-molecular aqueous solution, heat solidifying the said blend, aforementioned process and the aforementioned solidification lump which obtain the solidification lump where water solubility macromolecule are dispersed boiling processing at underwater, freezing drying process and the aforementioned gel substance which obtain the gel substance which aforementioned removes water solubility macromolecule from aforementioned solidification lump, including with the process which obtains the sponge of water absortion power, it features that it becomes.本発明のスポンジの製造方法は、水溶性高分子の水溶液を準備する工程と、多糖物質の溶液を準備する工程と、上記2つの溶液を混合し、該混合物を熱凝固させて、前記水溶性高分子が分散された凝固塊を得る工程と、前記凝固塊を水中で煮沸処理して、前記凝固塊から前記水溶性高分子を除去したゲル状物質を得る工程と、前記ゲル状物質を凍結乾燥して、吸水性のスポンジを得る工程とを含んでなることを特徴とする。
