| 摘要 |
PROBLEM TO BE SOLVED: To prevent illegal actions relative to a game machine beforehand by preventing a board storage box for storing a control board to be provided in a rear surface of a game machine body from being opened without leaving any traces. SOLUTION: The board storage box 90 sealed by storing the control board 82 has such a structure as capable of being easily opened without breaking a box body and a sealing part 110 only by cutting a connecting part 118. Oxygen detecting agent is stored in a detection agent storage chamber formed in a non-oxygen state in the inside of the connecting part 118 to be cut and the stored oxygen detecting agent can be visually observed from the outside.
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