| 摘要 |
PROBLEM TO BE SOLVED: To provide a network system for a game machine preventing disposal of a large number of used prepaid cards and causing no problem such as improper modification of information stored in a prepaid card. SOLUTION: The network system S is constructed of Pachinko machines 1, 1, or the like, a money value data selling machine 9 for selling money value data, and a central management computer 3 connected to the respective Pachinko machines 1, 1, or the like and the money value data selling machine 9 via electric wires 4. The Pachinko machine 1 is provided with a connection port for connecting to a cellular phone 2a, a transmitting/receiving part receiving a money value data balance when the money value data balance stored in the cellular phone 2a is transmitted from it connected to the connection port, and a game ball lending device lending game balls according to the money value data balance when it is received by the transmitting/receiving part.
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