| 摘要 |
PROBLEM TO BE SOLVED: To generate the change of the guide pattern of game balls in a stage face of a pachinko game machine and to make it possible to provide bonuses capable of enhancing the winning probability to starting ports. SOLUTION: In the pachinko game machine, an opening and closing type falling down hole communicating with a groove portion located directly under a mountain shape portion in the mountain shape portion of a stage face, and an opening and closing member turning around a lateral shaft parallel to the game board is arranged in the pachinko game machine so as to generate a first aspect and a second aspect by alternatively opening and closing the opening and closing type falling down hole and the falling down hole in the back side of the same. COPYRIGHT: (C)2007,JPO&INPIT
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