An electrochemical imaging method based on methyl orange was proposed and evaluated. A filter paper containing some aqueous solution of methyl orange was placed on an ITO glass electrode, and a platinum wire was used as a counter electrode. A DC voltage was applied between the two electrodes. When the applied voltage was below 1 V, the change in the color near both electrodes was not observed. When the applied voltage was over 2 V, the color of the paper near the anode changed from yellow to red. On the other hand, the color near the cathode did not change from yellow, and the generation of bubble was observed. The change in color near the anode seemed to be originated from the electrolysis of water. The red color formed by applying DC voltage disappeared within several seconds after cessation of applying voltage by the diffusion of the ion in the solution. The retention time of the red color exceeded 60 minutes, when the solution was turned into gel by adding some agar. It was also possible to eliminate the red color near the electrode by changing the polarity of applying voltage.