A reflective structure comprising: a plurality of helical structures each extending in a specific direction, the specific direction indicating a direction of helix axes of the helical structures; and a first light incidence surface on which light is incident, the first light incidence surface being substantially perpendicular to the specific direction, wherein the first light incidence surface includes one end of two ends of each of the helical structures, each of the helical structures includes a plurality of structure units (9, 9A) successive in the specific direction, each of the structure units includes a plurality of elements stacked in a twisted manner to form a helix, each of the structure units has a first end and a second end, the second end of one structure unit of structure units, among the plurality of structure units, adjacent to one another in the specific direction serves as the first end of the other structure unit, the reflective structure characterized in that: directions of orientation of the elements at the first ends included in the helical structures are identical, the reflective structure further comprises a reflective surface configured to reflect the light coming through the first light incidence surface, the reflective surface intersecting with the specific direction, the reflective surface includes at least one of the first ends included in each of the helical structures, and the reflective surface is non-parallel to the first light incidence surface due to the helical structures including two or more helical structures that have spatial phases different from each other, and the spatial phases of the helical structures indicate directions of orientation of the elements at the one ends of the respective helical structures. a plurality of helical structures each extending in a specific direction, the specific direction indicating a direction of helix axes of the helical structures; and a first light incidence surface on which light is incident, the first light incidence surface being substantially perpendicular to the specific direction, wherein the first light incidence surface includes one end of two ends of each of the helical structures, each of the helical structures includes a plurality of structure units (9, 9A) successive in the specific direction, each of the structure units includes a plurality of elements stacked in a twisted manner to form a helix, each of the structure units has a first end and a second end, the second end of one structure unit of structure units, among the plurality of structure units, adjacent to one another in the specific direction serves as the first end of the other structure unit, the reflective structure characterized in that: directions of orientation of the elements at the first ends included in the helical structures are identical, the reflective structure further comprises a reflective surface configured to reflect the light coming through the first light incidence surface, the reflective surface intersecting with the specific direction, the reflective surface includes at least one of the first ends included in each of the helical structures, and the reflective surface is non-parallel to the first light incidence surface due to the helical structures including two or more helical structures that have spatial phases different from each other, and the spatial phases of the helical structures indicate directions of orientation of the elements at the one ends of the respective helical structures. directions of orientation of the elements at the first ends included in the helical structures are identical, the reflective structure further comprises a reflective surface configured to reflect the light coming through the first light incidence surface, the reflective surface intersecting with the specific direction, the reflective surface includes at least one of the first ends included in each of the helical structures, and the reflective surface is non-parallel to the first light incidence surface due to the helical structures including two or more helical structures that have spatial phases different from each other, and the spatial phases of the helical structures indicate directions of orientation of the elements at the one ends of the respective helical structures.