PURPOSE: To provide the game device capable of easily preventing the deterioration of the appearance of a picture of a long length object in the game space due to the change in the line of sight direction of a player.

CONSTITUTION: In a game arithmetic part 100, the display coordinate of each summit on the picture of the long length object is obtained based on the arrangement information of the long length object stored in a storage part 103 and the control signal from a control part 12. The arithmetic processing fitting plural rectangular objects which is obtained by enlarging or reducing the prescribed rectangular object is performed for the long length object display graphic which is formed by connecting the obtained summit display coordinates. Thus, the arithmetic processing closely resembling the long length object display graphic is performed and the object information of plural rectangular objects are formed for the approximation, then it is outputted to a picture synthesizing part 200. In the part 200, the picture synthesizing processing is performed based on the object information or the like and the picture output is performed by a display part 10.