To make it possible for a player to select and obtain easily a prize he wants from many kinds of prizes, by providing an effective-value addition means which adds the result of the calculation of valuable objects given the player to an effective value specified by an issued member's recording-medium.

Lending-ball cards 134 are issued from a lending-ball-card-issuing company 103 where a central control computer 111 for adding amounts sold in each hall is installed, and they are shipped to each amusement parlor 100. Further, a member's-recording-medium-issuing center 104 where a central control computer 112 is installed is set up and member stores 107, each having a lending-ball-card vending machine 122 installed in it, is also set up. When a user given the ball-lending card in the amusement parlor plays pachinko, prize balls expelled as the result of the play are counted, thereafter, in a prize processor 5, an effective value recorded on a prize card is updated by addition. By inserting the prize card into the prize processor 9 of the member store 106, the user can see an actual prize and obtain it.