An image display device according to the present invention is provided with a plurality of image cells arranged in two-dimensional form, each of the image cells having a hologram layer. The hologram layer includes a diffraction grating in which a one-dimensional grating pattern extending along a first direction is repeated along a second direction orthogonal to the first direction. Two or more image cells, among the plurality of image cells, which are in a row along the second direction and which are correlated to one color constitute one image cell group. The image cell group includes a portion in which the spatial frequency of the diffraction grating is proportionately small as the distance in the second direction from one end of the image cell group increases so that, while a view point is positioned in a prescribed direction relative to an image display device, the two or more image cells constituting the image cell group will display the same color as each other.