Abstract: Spheres of activated carbon are obtained by adding to 100 parts by weight of pitch 10 to 50 parts by weight of an aromatic solvent compatible with said pitch and 2 to 50% by weight, based on the total weight of said pitch and said aromatic solvent, of a nitrogen-containing compound, melting and mixing them with one another, molding the resultant mixture in the form of spheres, removing the aromatic solvent by means of solvent extraction to convert said spheres into porous pitch spheres containing 2 to 60% by weight of nitrogen, infusibilizing the resultant micro-porous pitch spheres and thereafter activating the infusibilized pitch spheres.