To obtain an IC card which is excellent in anti-collision performance and also does not have so much twist.

This IC card is constituted so that when two IC cards are overlapped while facing each other, the antenna coil 1 on one card base and the antenna coil 1 on the other card base are formed making a round so as not to overlap except a place where the coils 1 are partially crossed, and where a dummy conductor 20 is arranged at the place where the round is made, and the coils 1 are formed on both faces of a plastic film, their shapes are formed making a round so as not to overlap except the place where the coils 1 on the both faces cross, when the two IC cards are overlapped, the mutually opposed antenna coils 1 are also formed making a round so as not to overlap except the place where the coils 1 cross, and the conductor 20 is arranged at the place where the round is made.