To provide a supersonically-treated carbonaceous material having a modified surface and/or modified bulk used for a battery, especially as an anode.

This manufacturing method of a carbonaceous material for an electrode of a battery comprises (1) a process for adding a solvent to a carbonaceous material and (2) a process for reforming surface characteristics and/or bulk characteristics of the carbonaceous material, and the reforming process further comprises a process for bringing a supersonic sound source close to the carbonaceous material, a process for starting supersonic treatment of the carbonaceous material and a process for stirring the carbonaceous material.