This invention provides a process for producing a dispersion liquid of an intrinsic electroconductive polymer in an organic solvent, comprising a deionization step of deionizing an aqueous colloid dispersion liquid of an intrinsic electroconductive polymer by a liquid feeding method to remove cations adsorbed on the intrinsic electroconductive polymer, a solvent displacement step of subjecting water in the aqueous colloid dispersion liquid after the deionization step to solvent displacement with an organic solvent (excluding N-methylpyrrolidone and dimethyl sulfoxide), and an additive treatment step of, after the solvent displacement step, adding N-methylpyrrolidone or dimethyl sulfoxide. This process can easily produce a dispersion liquid of an intrinsic electroconductive polymer in an organic solvent that can be used in various applications such as electrode materials, antistatic agents, ultraviolet absorbers, heat absorbers, electromagnetic wave absorbers, sensors, electrolytes forelectrolytic capacitors, and electrodes for rechargeable batteries.