To continuously keep expectation of a player high even after a visual presentation is started.

A left door 610 and a right door 620 of a game machine are installed in an openable/closable manner in front of an liquid crystal display device 700. As the left door 610 and the right door 620 are composed of a transparent section transmitting display image (several round open holes placed periodically at regular intervals) and a non-transparent section (a part made of black resin), a part of the image displayed on a display screen is visible to the player through the transparent section even in a state that the display screen of the liquid crystal device 700 is physically covered. As the result even if the displayed information of the image is incomprehensible in a state illustrated in Fig.5(b), the transparent sections of the doors extract new information of the image from the displayed information of the image comprehensible for the player when it is in the state illustrated in Fig.5(c) or 5(d) and output information of the image with specific meaning.

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