Lighting device and display device

A lighting device comprising:

• a light source having a light emitting surface;
• a light source board having a mount surface on which the light source is mounted with one of outer surfaces of the light source that is adjacent to the light emitting surface being in contact with the mount surface, the light source board at least including a light-source overlapping portion overlapping the light source and an extension portion extending from the light-source overlapping portion in a direction in which the light emitting surface faces;
• and
• a light guide plate in which at least a portion of an outer end surface thereof is a light input surface that receives light from the light source, one of two plate surfaces thereof is a light-exit surface through which the light exits, and the other of the plate surfaces is a light-exit opposite surface, the light guide plate being integrated with the light source and the light source board with the light input surface being in direct contact with the light emitting surface of the light source and the light-exit surface or the light-exit opposite surface being in direct contact with the mount surface of the extension portion.