In a vehicle display device in the invention, because the display position of a displayed image is adjusted by a display position calculation portion (14) and a drive control portion (15) when a predetermined vehicle travel condition is detected by a travel condition detection portion (12), the display position is adjusted while the driver is looking at the displayed image. In addition, adjustment of the display position may be avoided when the driver is not looking at the displayed image. Therefore, the display device avoids annoying the driver, and avoids needless adjustment of the display position. The display position of the image is adjusted based on the detected eyeball position.