PURPOSE: To provide a pachinko game machine which makes it possible to set the probability of a big hit of a pattern-indication device in a plurality of steps and adjust the reward-ball ratio without necessity of nail-adjustment.

CONSTITUTION: A main control circuit of a pachinko game machine is provided with a key switch 54 by which a big hit probability of a pattern-indicating device 19 is changed over in a plurality of steps by a remote control, an EEPROM memorizing the probability mode preset by the key switch 54 to be able to rewrite the mode, and a probability mode data indicator 55 visually showing the probability mode stored in the EEPROM. The EEPROM can be rewitten only when the key switch 54 is operated on turning on the electric source.