The present invention provides a medal-operated gaming machine characterized by comprising a data writing/reading means for executing the writing of at least one kind of initial data of the game and history data of the game into a medal with a built-in IC chip, and the reading of at least one kind of initial data of the game and history data of the game from the bullt-in-IC-chip medal. According to the above means, the gaming machine gives doubled amusement by having an unprecedented excitement in addition to the excitement of the game itself by giving various values to the medal.