A communication system, comprising: an information storage medium (40, 240); an electromagnetic induction communication device; and a relay communication device (30, 230) disposed between the information storage medium (40, 240) and the electromagnetic induction communication device, the communication system performing communication while conveying the information storage medium (40, 240), wherein the information storage medium (40, 240) comprises: an IC chip configured to be communicable through electromagnetic induction or electromagnetic coupling; and a pair of electrically conductive plates (42L, 42R, 242L, 242R) connected to the IC chip, wherein the relay communication device (30, 230) comprises: a relay loop antenna; and a pair of electrically conductive rails (32L, 32R, 232L, 232R) which is connected to both ends of the relay loop antenna, placed along a conveyance direction of the information storage medium (40, 240), and electrostatically coupled with the pair of electrically conductive plates (42L, 42R, 242L, 242R) of the information storage medium (40, 240), and wherein the electromagnetic induction communication device comprises: a communication loop antenna configured to communicate with the relay loop antenna through electromagnetic induction or electromagnetic coupling; and a control unit configured to execute processing of communication with the IC chip of the information storage medium (40, 240), when the communication loop antenna communicates with the relay communication device (30, 230) through electromagnetic induction or electromagnetic coupling, and the relay communication device (30, 230) electrostatically couples with the information storage medium (40, 240) characterized in that the relay communication device includes: an insertion slot into which a user inserts the information storage medium; and an alignment device configured to align the information storage medium inserted into the insertion slot, such that the pair of electrically conductive plates (42L, 42R, 242L, 242R) is juxtaposed each other with respect to a direction orthogonal to the conveyance direction. an information storage medium (40, 240); an electromagnetic induction communication device; and a relay communication device (30, 230) disposed between the information storage medium (40, 240) and the electromagnetic induction communication device, the communication system performing communication while conveying the information storage medium (40, 240), wherein the information storage medium (40, 240) comprises: an IC chip configured to be communicable through electromagnetic induction or electromagnetic coupling; and a pair of electrically conductive plates (42L, 42R, 242L, 242R) connected to the IC chip, an IC chip configured to be communicable through electromagnetic induction or electromagnetic coupling; and a pair of electrically conductive plates (42L, 42R, 242L, 242R) connected to the IC chip, wherein the relay communication device (30, 230) comprises: a relay loop antenna; and a pair of electrically conductive rails (32L, 32R, 232L, 232R) which is connected to both ends of the relay loop antenna, placed along a conveyance direction of the information storage medium (40, 240), and electrostatically coupled with the pair of electrically conductive plates (42L, 42R, 242L, 242R) of the information storage medium (40, 240), and a relay loop antenna; and a pair of electrically conductive rails (32L, 32R, 232L, 232R) which is connected to both ends of the relay loop antenna, placed along a conveyance direction of the information storage medium (40, 240), and electrostatically coupled with the pair of electrically conductive plates (42L, 42R, 242L, 242R) of the information storage medium (40, 240), and wherein the electromagnetic induction communication device comprises: a communication loop antenna configured to communicate with the relay loop antenna through electromagnetic induction or electromagnetic coupling; and a control unit configured to execute processing of communication with the IC chip of the information storage medium (40, 240), when the communication loop antenna communicates with the relay communication device (30, 230) through electromagnetic induction or electromagnetic coupling, and the relay communication device (30, 230) electrostatically couples with the information storage medium (40, 240) a communication loop antenna configured to communicate with the relay loop antenna through electromagnetic induction or electromagnetic coupling; and a control unit configured to execute processing of communication with the IC chip of the information storage medium (40, 240), when the communication loop antenna communicates with the relay communication device (30, 230) through electromagnetic induction or electromagnetic coupling, and the relay communication device (30, 230) electrostatically couples with the information storage medium (40, 240) characterized in that the relay communication device includes: an insertion slot into which a user inserts the information storage medium; and an alignment device configured to align the information storage medium inserted into the insertion slot, such that the pair of electrically conductive plates (42L, 42R, 242L, 242R) is juxtaposed each other with respect to a direction orthogonal to the conveyance direction. an insertion slot into which a user inserts the information storage medium; and an alignment device configured to align the information storage medium inserted into the insertion slot, such that the pair of electrically conductive plates (42L, 42R, 242L, 242R) is juxtaposed each other with respect to a direction orthogonal to the conveyance direction.