PURPOSE: To raise the working rate of the game machine.

CONSTITUTION: When a non-working state deciding part 20 decides a fact that a Japanese pinball game (PACHINKO) machine is in a non-working state, based on a detecting signal of an operating state detecting part 10 of the PACHINKO machine, and the non-working state continues for a prescribed time, a non-working information display part 40 displays non-working information in front of the game machine, therefore, when a watchman walks round in a game hall, the watchman can decide at a glance how long the PACHINKO machine is in a non-working state, and also, can cope therewith immediately.