The present invention aims to provide an adsorptive carrier having remarkable blood component-adsorbing capacity, especially inflammatory cytokine-adsorbing capacity irrespective of whether the carrier has an amide group and/or the like, which carrier also has high solvent resistance and heat resistance, and to provide a method for producing an adsorptive carrier, wherein introduction of a desired functional group on the surface of the carrier and cross-linking between aromatic rings can be achieved by a single step. The present invention provides an adsorptive carrier composed of one or more high-molecular-weight compounds each of which comprises two or more aromatic ring-containing repeating units, which aromatic rings are covalently bound to each other via the structure represented by the General Formula (I) below: [wherein R 1 represents hydrogen or an organic group, and R 2 represents an organic group].
