An LED light source includes a board, a holder, an LED, a fastener, a lens, a supporter, and an adhesive. The board has a first surface. The holder is arranged on or above the first surface. The LED is arranged on or above the first surface. The fastener fastens the LED to the first surface. The lens has an exterior shape larger than the LED as viewed in a plan view, and is arranged on or above an LED upper surface to refract LED light so as to direct the light outward. The supporter is arranged on an exterior with respect to the LED as viewed in a plan view on a lens surface facing the first surface. The supporter is held by the holder for positioning of the lens at a predetermined position on the first surface. The adhesive bonds the supporter and the board together.