PURPOSE: To have adjustment work done more speedily by calculating a total count value of game media based on an exchange rate corresponding to the value of desired giveaway products, and by adjusting remaining game media not reaching the exchange rate based on the calculation result.

CONSTITUTION: When a player puts game balls that have been obtained into a game medium receiver in a ball counter 10, and presses, for example, a card selection switch 5, a total count value of the game media that have been put is calculated based on an exchange rate corresponding to the value of desired giveaway products in a calculation control means in a control means. Additionally, in a game medium adjustment means, a remaining number of game media that does not reach the giveaway exchange rate based on the result of the calculation by the calculation control means is adjusted, and a 'grand total' of the number of the game balls is indicated on a calculation indicator 17. At the same time, a 'dividing number' as a number of giveaway exchange is indicated on a giveaway exchange indication means 18, a number of remaining balls that does not reach the exchange rate (the remaining number) is indicated on a game medium indication means 19, and a card corresponding to the dividing number is issued from a card issuing apparatus 20.