An object of the present invention is to provide an adsorbent for oral administration capable of adsorbing large quantities of indole in the presence of bile acid. The above problem can be solved by an adsorbent for oral administration comprising a spherical activated carbon, the activated carbon having a specific surface area determined by the BET method of 800 m 2 /g or more, a bulk density of from 0.3 g/mL to 0.8 g/mL, a volume of pores having a diameter less than 3 nm of 0.3 mL/g or more, and a micropore/mesopore ratio (Vm) determined by Formula (1): Vm = Vmic/Vmet (1) wherein Vmic is a volume of pores having a diameter less than 3 nm, and Vmet is a volume of pores having a diameter from 3 nm to 50 nm； of 3.0 or more.
