An in-vehicle stereoimage display apparatus (70) includes a display device (10), an erecting unit magnification lens module (2) spaced from and facing toward a display screen of the display device (10) for forming an erecting unit magnification stereoimage (15a) of an image displayed on the display screen (15), a lens movement mechanism (61, 65, and 75) for movably supporting the erecting unit magnification lens module (2), and a controller (76) for changing the position of the erecting unit magnification lens module (2) in accordance with the travel velocity of a vehicle. In one example, the controller increases the distance between the vehicle driver's eyes and the erecting unit magnification stereoimage as the travel velocity of the vehicle increases.