PURPOSE: To provide a game device which can improve the safety and can simplify the control.

CONSTITUTION: A driving game device 1 is constituted by providing a helmet 2 which is mounted in the head part of a player P in the course of game play, and interlocked with an operation of the head part of the player P, an acceleration sensor 4 and a game control part for detecting a position and a direction of the helmet 2, a projector 3 for outputting an image corresponding to the position and the direction of the helmet, and a spherical dome 6 for projecting the image outputted by the projector 3, and also, fixing and attaching the projector 3 to the helmet 2.