To provide a pinball game machine allowing simplification of random number reading processing in read-ahead determination.

This pinball game machine includes: a first-in first-out holding storage region 55b; a variation start time-determining means 65 determining random number information stored in the head of a queue on the holding storage region 55b at the time of a symbol variation start; and a read-ahead determination processing means 63b determining the random number information before the determination by the variation start time-determining means 65. The pinball game machine executes: random number management processing including random number acquisition processing to store a big win-determining random number value acquired when a symbol start condition is satisfied into a random number value storage region 55a based on that the symbol start condition is satisfied; and start winning processing including random number storage processing making the random number information on the random number value storage region 55a be stored in the end of the holding storage region 55b and read-ahead determination processing performing the determination by the read-ahead determination processing means 63b by use of the random number information on the random number value storage region 55a based on that the symbol start condition is satisfied.