The invention relates to a reaming element for a reaming tool capable of being driven to rotate about an axis of rotation for fine machining of a prefabricated bore, said reaming element having a front main cutting edge and a secondary cutting edge adjoining the radially outward end of the main cutting edge, wherein the main cutting edge and the secondary cutting edge delimit a chip-removing surface, and a polished chamfer, which forms a support zone for guidance on the wall of the bore, is formed between the secondary cutting edge and the rear flank face thereof. According to the invention the support zone is smaller than the polished chamfer and is kept a lateral distance away from the secondary cutting edge by an intermediate part, more particularly a recessed intermediate part, of the polished chamfer.