An optical structure, comprising: a structure surface that includes a plurality of display region groups including a first display region group (11G1) and a second display region group (11G2), each of the display region groups having a plurality of display regions (11a, 11b), wherein: each display region of each display region group includes a plurality of reflective surfaces that reflect light incident on the structure surface toward a display direction of an image that is unique to the display region group, the reflective surfaces being arranged at an average pitch of 1 um or more and 300 um or less in a direction in which the reflective surfaces are arranged; in each display region, a projection direction is defined, the projection direction being a direction in which a normal direction to the reflective surfaces is projected onto the structure surface and having an azimuth angle (Φ) relative to a reference direction in the structure surface, and the plurality of reflective surfaces belonging to the display region produce an image; in each display region group, the plurality of display regions include a set of display regions whose azimuth angles are different from each other, and the plurality of display regions produce an image, which is unique to the display region group, in the display direction by the plurality of reflective surfaces belonging to each of the display regions; the display direction of the first display region group is different from the display direction of the second display group to provide brightness that is different between the image unique to the first display region group and the image unique to the second display region group, in the respective display directions of the images; and the first display region group and the second display region group match each other to produce a motif; and characterised in that each display region has an area of 0.1 mm 2 or more and 0.5 mm 2 or less. each display region of each display region group includes a plurality of reflective surfaces that reflect light incident on the structure surface toward a display direction of an image that is unique to the display region group, the reflective surfaces being arranged at an average pitch of 1 um or more and 300 um or less in a direction in which the reflective surfaces are arranged; in each display region, a projection direction is defined, the projection direction being a direction in which a normal direction to the reflective surfaces is projected onto the structure surface and having an azimuth angle (Φ) relative to a reference direction in the structure surface, and the plurality of reflective surfaces belonging to the display region produce an image; in each display region group, the plurality of display regions include a set of display regions whose azimuth angles are different from each other, and the plurality of display regions produce an image, which is unique to the display region group, in the display direction by the plurality of reflective surfaces belonging to each of the display regions; the display direction of the first display region group is different from the display direction of the second display group to provide brightness that is different between the image unique to the first display region group and the image unique to the second display region group, in the respective display directions of the images; and the first display region group and the second display region group match each other to produce a motif; and characterised in that each display region has an area of 0.1 mm 2 or more and 0.5 mm 2 or less.