To provide a movable winning device which makes it difficult to acquire many privileges by a fraudulent action.

The movable winning device of the game machine provided on the game board of the game machine and provided with a winning port is equipped with: a pair of movable pieces provided above the winning port and each movable between an opening position and a closing position; a pair of driving pieces engaged with the respective movable pieces and freely movable between a driving position and a non-driving position corresponding to the opening position and closing position of the movable pieces; a driving means for moving the each of the driving pieces by adding driving force to the driving position; and a restoration force imparting means for adding restoration force toward the non-driving position to each of the driving pieces.

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