In a display unit of the present invention, an instrument frame body (speedometer frame body, power meter frame body) are changed to a map frame body in a process that the road image is stepwise reduced and display to the map image by switching from a road display state to a map display state. Further, the map frame body is changed to the instrument frame body in a process that the map image is stepwise enlarged and displayed to the road image by switching from the map display state to the road display state.