A gaming machine uses a trading card 20. The trading card 20 stores character data concerning a character and has a surface printed with a detail of the character data. A trading card handling device 60 writes changed character data into the trading card 20 in response to a change in character data according to a state of proceeding with a game. A printing device 49 prints detail of the changed character data onto the surface of the trading card 20. A heating device 68 is for erasing the detail of the character data printed previously at the time of printing. A player can grasp details of character data stored in the trading card and changes thereof without depending on the gaming machine to read the trading card.