| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a conventional circuit board storage device that a countermeasure against an unfair act is impossible immediately after the unfair act is performed because it is often difficult to find out that a circuit board storage case is opened and the unfair act is performed by an unfair person. SOLUTION: A circuit board 4 is stored in the case 1 consisting of a lower case 2 and an upper case 3 in the circuit board storage device 10 of the game machine. The circuit board storage device 10 has a means for leaving the trace of an unfair act. The means releases a material when the case 1 is opened and the unfair act is performed to the circuit board 4, and the material is applied to an electronic component 5 mounted on the circuit board 4 or to the case 1 so that the trace of the unfair act is left.
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