Abstract: A carbon electrode material includes carbon fibers (A); carbon particles (B) other than graphite particles; carbon material (C) for binding the carbon fibers (A) and the carbon particles (B) to each other, and the carbon electrode material satisfies: (1) a particle diameter of the carbon particles (B) other than graphite particles is not larger than 1 ?m, (2) Lc(B) is not larger than 10 nm when Lc(B) represents a crystallite size, in a c-axis direction, obtained by X-ray diffraction in the carbon particles (B) other than graphite particles, (3) Lc(C)/Lc(A) is 1.0 to 5.0, (4) a meso-pore specific surface area obtained from a nitrogen gas adsorption amount is less than 30 m2/g, and (5) a number of oxygen atoms bound to a surface of the carbon electrode material is not less than 1% of a total number of carbon atoms on the surface of the carbon electrode material.