To provide a LED having a lead frame electrode structure which is suitable for a display, an illuminator, and a liquid crystal back light device using the LED and for a light source device for projector.

In the LED where an LED chip 100 is constituted on a sapphire substrate 101 and a lead frame electrode 108 made of plate-shaped metallic material is joined with the constituent face of the LED chip 100 of this sapphire substrate 101, it becomes easy to electrically join the lead frame electrode 108 and the electrode of the LED chip 100 since the lead frame electrode 108 and the constituent face of the LED chip 100 are on roughly the same level, and also this can improve the heat radiation from the LED chip 100 since the sapphire substrate 101 and the lead frame electrode 108 are joined with each other.