An object is to provide a material capable of removing Aβ from a body fluid efficiently and use of the material, which are developed for the purpose of establishing a therapeutic or preventive method for Alzheimer's disease. Provided is an amyloid β protein remover, containing a carrier made of any one material selected from the group consisting of cellulose, silica, polyvinyl alcohol, and activated carbon, wherein the carrier does not have an alkyl chain on the surface thereof or has an alkyl chain having 1 to 18 carbon atoms on the surface thereof.