To provide a game machine capable of suppressing the waning of a player's interest by responding to a temperature change, a time course and the like and preventing them from interfering with a game.

The Pachinko machine is provided with a game board 5 which has a through-hole 212 disposed in a position corresponding to a game area 37 where a game ball is shot, a frame-shaped base frame body 210 having a plurality of projecting pieces 213 projecting inside the through-hole 212, a front constitution member 79 disposed in the front face of the base frame body 210, and having a guide rail 78 demarcating and forming a game area 37 and guiding a game ball, a plate-shaped base body 211 clamped in the front/rear direction between the front constitution member 79 and the projecting pieces 213 of the base frame body 210, inserted inside the through-hole 212, and composed of transparent resin having the thickness thinner than the thickness S1 of the base frame body 210, and an expansion/contraction permitting means composed of an elastic member 218 allowing the expansion/contraction of the base body 211 between the outer circumference of the base body 211 and the inner circumference of the through-hole 212.

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