The present invention relates to an indium ratio from 80 to 98.9% by weight, and the tin proportion is from 2 to 20% by weight of surface-modified agglomerates of indium tin oxo hydrate carbon ratio of 0.01 to 1% by weight. The present invention further relates to a method of producing a surface-modified agglomerates of indium tin oxide to calcination under reducing conditions, then dried in air in an indium tin oxo hydrate the surface of the modified agglomerates greater than 150 ℃ to a temperature of less than 310 ℃ of will be. The invention further relates to a surface-modified agglomerates of indium tin oxide which can be obtained by the method. The present invention give a mixture by adding the added surface-modified agglomerates and solvent one or more kinds in and, and converting the mixture into a dispersion by the dispersion device, optionally in the indium tin oxide to remove from the dispersion liquid composition to obtain a powder of surface-modified powder, and a method of producing his dispersion. The present invention relates to a process for preparing a coating material or molding material added using indium tin oxide or indium tin oxide powder of agglomerates binder dispersion and at least one kind of in each case.