PROBLEM TO BE SOLVED: To provide a configuration in which it is difficult for a general reading device to recognize an information code at the normal time, but a specific reading device can surely read the information code.SOLUTION: An information code display medium 10 is provided with a coating layer 12 so as to coat one surface 14A side of a formation part 14 to which an information code C is given. The coating layer 12 has such a configuration that it becomes a transmission state when light with a predetermined wavelength different from visible light is emitted thereto, and it becomes a non-transmission state with transmissivity lower than that of the transmission state when the visible light is emitted thereto. On the other hand, the formation part 14 consists of a medium with light transmissivity which can transmit at least light with the predetermined wavelength. The information code C is arranged on the side opposite to the coating layer 12 in the formation part 14 or inside the formation part 14 with
