| 摘要 |
PROBLEM TO BE SOLVED: To provide a pachinko machine capable of preventing an unfair conduct by a pachinko parlor, that is, the advantageous or disadvantageous states for a player are feigned by changing the burying depth of game nails, and confirming whether the burying state of the game nails to the game board is justifiable or not by the player. SOLUTION: A number of game nails 4 are buried in a game board 9 installed in a pachinko parlor. The game nail 4 comprises a disc-shaped head on one end of a metallic cylindrical part 6, and the conical other end. A mark 1 (annular groove) is cut on a position corresponding to a specific burying depth to the game board 9, of the cylindrical part 6. A mark 2 at a head side with respect to the mark 1, and a mark 3 at a peak side with respect to the mark 1 are respectively coaxially cut. The mark 1 has green color, the mark 2 has blue and the mark 3 has red, so that they can easily be distinguished.
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