An adsorbent for an oral administration, comprising asurface-modified spherical activated carbon wherein anaverage particle diameter is 50 to 200 µm, a specificsurface area determined by a BET method is 700 m2/g or more,a bulk density is less than 0.54 g/mL, a total amount ofacidic groups is 0.30 to 1.20 meq/g, and a total amount ofbasic groups is 0.20 to 0.9 meq/g is disclosed. Theadsorbent for an oral administration has a highadsorbability, and is capable of adsorbing a large amount oftoxins during a retention period in an intestine, and ofremarkably reducing an amount of urinary proteins excretion.
