Deflector, display device, and method of manufacturing deflector

A deflector comprising:

• a support substrate including a curved portion that curved along a first direction intersecting a thickness direction, the curved portion including a convex curved surface facing to one side in the thickness direction;
• a holographic element laminated on at least one of a first surface and a second surface of the curved portion in the thickness direction, and configured to deflect and output that is incident toward the curved portion;
• and
• a holder configured to hold the support substrate, wherein
• the holder includes a first fixing portion that overlaps with a first supported portion in the thickness direction and that is fixed to the first supported portion, the first supported portion being a part of the curved portion on a first side in the first direction, and a second fixing portion that overlaps with a second supported portion in the thickness direction and that is fixed to the second supported portion, the second supported portion being a part of the curved portion on a second side in the first direction.