PURPOSE: To shoot a game medium under a shooting condition in which the attainability to a prize winning port or a passing gate is high and advantageous to a game player.

CONSTITUTION: A shooting condition command means (honor prize port control device 100) outputs a shooting condition signal JS1 for making the attainability maximum according to the attainability (passing rate and prize winning rate) of a game medium calculated by an attainability calculating means (CPU for honor prize port), and a shooting control means (shooting control device 200) regulates the shooting distance of a game medium according to a shooting condition signal JS1, so that shooting of a game medium advantageous to a game player can be always accomplished.