A non-authentic article discrimination system for discriminating whether an article to which an IC tag is attached is a non-authentic article includes an IC tag and a base device. The IC tag includes a first antenna portion for receiving a radio wave, a power generation circuit for generating electric power from the radio wave received by the first antenna portion, a first storing portion for storing information regarding the article, and a radio wave output circuit for outputting a radio wave including the information stored in the first storing portion via the first antenna portion. The base device includes a second antenna portion for receiving the radio wave transmitted from the first antenna portion and transmitting a radio wave generated in the base device toward the IC tag, a second storing portion for storing information regarding the article, the information stored in the second storing portion being the same as the information stored in the first storing portion, a discriminating portion for discriminating whether the first information included in the radio wave received by the second antenna portion coincides with the information stored in the second storing portion, and a displaying portion for displaying a discrimination result of the discrimination portion.