An aerial image display device, comprising: a display device; a first optical element on which light emitted from the display device is incident, the first optical element being inclined at 45° to the display surface of the display device and transmitting part of incident light and reflecting part of the incident light; a second optical element on which the light emitted from the display device is incident, the second optical element reflecting the light which is emitted from the display device and passes through the first optical element toward a reflecting surface of the first optical element; and a third optical element on which the light emitted from the display device is incident, the third optical element being inclined at 45° to the display surface of the display device and reflecting the light emitted from the display device toward a transmitting surface of the first optical element, wherein the light which is emitted from the display device, reflected by the second optical element, and reflected by the reflecting surface of the first optical element forms a first virtual image corresponding to a first display image displayed on the display device, wherein the light which is emitted from the display device and reflected by the third optical element forms a second virtual image corresponding to a second display image displayed on the display device, characterized in that the first optical element, second optical element and the third optical element are installed such that a first optical path length of an optical path in which the light perpendicularly emitted from the display device passes through a center position of the first optical element, reflects at the second optical element, and reaches the reflecting surface of the first optical element is larger than a second optical path length of an optical path in which the light perpendicularly emitted from the display device reflects at a center position of the third optical element and reaches the transmitting surface of the first optical element. a display device; a first optical element on which light emitted from the display device is incident, the first optical element being inclined at 45° to the display surface of the display device and transmitting part of incident light and reflecting part of the incident light; a second optical element on which the light emitted from the display device is incident, the second optical element reflecting the light which is emitted from the display device and passes through the first optical element toward a reflecting surface of the first optical element; and a third optical element on which the light emitted from the display device is incident, the third optical element being inclined at 45° to the display surface of the display device and reflecting the light emitted from the display device toward a transmitting surface of the first optical element, wherein the light which is emitted from the display device, reflected by the second optical element, and reflected by the reflecting surface of the first optical element forms a first virtual image corresponding to a first display image displayed on the display device, wherein the light which is emitted from the display device and reflected by the third optical element forms a second virtual image corresponding to a second display image displayed on the display device, characterized in that the first optical element, second optical element and the third optical element are installed such that a first optical path length of an optical path in which the light perpendicularly emitted from the display device passes through a center position of the first optical element, reflects at the second optical element, and reaches the reflecting surface of the first optical element is larger than a second optical path length of an optical path in which the light perpendicularly emitted from the display device reflects at a center position of the third optical element and reaches the transmitting surface of the first optical element.