PURPOSE: To provide a vehicle display device in which colors of a display light are changed corresponding to color polarizing members by the control of an optical rotation member and virtual images having the same brightness are seen even when colors of the display light are changed since the deflection direction of the display light emitted from a display unit is always coincident with the vibration direction of an S polarization component determined by the positional relation between a driver and a reflection member.

CONSTITUTION: A display unit 10 is provided with a TN type LCD 4 having the design for a display use, a pair of polarization members 11, 12 holding the LCD 4 from back and forth sides. A pair of color polarization members 13, 14 whose axes of an absorption are orthogonally crossed and having different colors and a LCD (an optical rotation member) 15 capable of rotating a deflection direction by 90 degrees are arranged towards the advancing direction of a display light 6. The deflection direction of the display light 6 is set so as to be coincident with the vibration direction of the S polarization component by ray-tracing the vibration direction of the S polarization component determined by the positional relation between the driver and the reflection member to the display unit 10.