Provided is an adsorbent for removing histones from a liquid derived from a living-organism, including a water-insoluble carrier and a biocompatible polymer. The carrier has activated carbon, a polyester, a polysulfone, or a cationic functional group. Also provided is a device for purifying a liquid derived from a living-organism to remove histones from a liquid derived from a living-organism, which has a housing equipped with an inlet and an outlet for the liquid derived from the living-organism and the above-described adsorbent housed in the housing. The liquid derived from the living-organism is moved through the housing of device for purifying the liquid derived from the living-organism to remove histones from the liquid derived from the living-organism.
