A virtual image display device includes: a display unit that generates an image display light by modulating an illumination light; and a projection optical system that includes at least a concave mirror for reflecting the image display light toward a virtual image presentation plate. The display unit is provided at a position nearer a focal point within a meridional plane of a composite optical system formed by the virtual image presentation plate and the projection optical system than a focal point within a sagittal plane of the composite optical system.