Optical member

An optical member comprising:

• a light guide body including
• an incident surface on which a light from a blind area is incident,
• a first reflecting surface configured to reflect the light guided from the incident surface,
• a second reflecting surface configured to reflect the light reflected by the first reflecting surface,
• a plurality of prisms protruding from the first reflecting surface in a normal direction of the first reflecting surface, arranged at an interval, and configured to emit the light guided from the incident surface and the light reflected by the second reflecting surface to an outside of the light guide body, and
• a protruding portion protruding from the first reflecting surface in the normal direction;
• and
• a light shielding member being in contact with the protruding portion to provide a space between the light shielding member and the first reflecting surface and covering the first reflecting surface to block a light incident toward the first reflecting surface from the outside of the light guide body.