An illusion apparatus for causing an illusion that an object which is not actually moving is perceived to be moving,
- the illusion apparatus comprising a final target object including a final target that is equivalent to an object obtained by superposition of three objects of a target, a dark object, and a light object which have approximately a same shape, wherein
- the final target object is arranged in a background of which luminance periodically varies over time,
- luminance of the dark object is lower than luminance of the target,
- luminance of the light object is higher than the luminance of the target, and
- the superposition is an incomplete superposition in which a part of the dark object and a part of the light object are hidden by the target, wherein
- luminance of the background also periodically varies in a spatial manner.