PURPOSE: To eliminate the need for carrying pachinko balls and make it easy to recognize prize balls by disposing a display unit for displaying the amount of pachinko balls in the vicinity of each of the island of Japanese pinball games (pachinko) machines so that the unit is visible to the player and other persons, and providing a card device corresponding to each of the pachinko game machines.

CONSTITUTION: A number of pachinko game machines 6 are arranged in an island and a trouble indicator lamp and a display unit 10 are provided above each of the pachinko game machines 6. The display unit 10 is of digital display type of e.g. eight digits and is capable of displaying the current amount of prize balls to the player at that machine, and other players and attendants as well at high visibility. Each of the pachinko game machines 6 is provided with a card device 80 and a storage means. The storage means reads and stores information about amounts of remaining game balls and prize balls, information about the total paid by a card 82 and the remainder of the card and other informations using the card device 80.