A multi-viewpoint floating image display device enabling observation from multiple viewpoints by combining mirror images of objects to be projected and spatially separated from one another as real images in a small region in space. The display device comprises a multi-viewpoint floating image display optical system having real mirror imaging optical systems each of which forms a real image of each of the objects in a plane-symmetric position symmetric to the object with respect to one geometrical plane which is the symmetry plane. All the real mirror imaging optical systems are so arranged that the angle formed by given symmetry planes is less than 180 degrees on the real image side with respect to the symmetry planes. The objects are so arranged as to correspond to the respective real mirror imaging optical systems.