An electrode substrate comprising; an electrode comprising a compound containing an In atom and a substrate body, wherein a half band width ratio [In3d_5/2]_h/[In3d_5/2]_n is from 0.9 to 1.2 wherein [In3d_5/2]_h is a half band width of a 3d_5/2 orbit spectral peak of an In atom in the surface of the electrode, and [In3d_5/2]_n is a half band width of a 3d_5/2 orbit spectral peak of an In atom in the interior of the electrode, the spectral peaks being measured by X-ray photoelectron spectroscopy: and the method for the production thereof.