PROBLEM TO BE SOLVED: To provide a smartphone for, when a smartphone used as a ticket is not able to pass through an automatic ticket gate due to the expiration of validity or the like, displaying ticket face image information at the operation display part of the smartphone and an automatic ticket gate using the smartphone and an automatic ticket gate system using the smartphone and the automatic ticket gate.;SOLUTION: When boarding information is transmitted from a smartphone 70 on the basis of a boarding information request (S1) from an automatic ticket gate 30 (S4), the automatic ticket gate transmits a boarding determination result and decryption key information based on the boarding information to the smartphone (S5). When the received boarding determination result is abnormality determination such as the expiration of validity, the smartphone reads ticket face image information based on the boarding information from a storage part (73) by using the received decryption key information, and outputs the ticket face image information to an operation display part 71 (S8). The operation display part displays the input ticket face image information.;COPYRIGHT: (C)2013,JPO&INPIT
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