A floating image display unit according to an embodiment of the technology includes an optical plate and one or a plurality of reflectors. The optical plate includes a plurality of optical elements arranged in a matrix on a substrate having a normal in a Z-axis direction, and each of the optical elements is configured to regularly reflect an entering light beam of a Z-axis direction component and recursively reflect an entering light beam of an XY-axis direction component. The one or the plurality of reflectors are configured to reflect light outputted from a light emitter or a light irradiation target object disposed on rear surface side of the optical plate, thereby causing the light to obliquely enter a rear surface of the optical plate.