An LED lighting fixture comprising: a light-emitting device that includes an LED chip, a heat transfer plate made of a thermally conductive material and having one side on which the LED chip is mounted, a wiring board having on one side a patterned conductor for supplying an electric power to the LED chip, being bonded to an LED chip mount-side of the heat transfer plate, and being formed with an exposure part through which the LED chip mount-side on the heat transfer plate is exposed, an encapsulation part in which the LED chip is encapsulated on the one side of the wiring board; a frame in form of a cylinder (40; 400) provided to surround the LED chip on the one side of the wiring board, wherein the encapsulation part is provided inside the frame (40; 400); an optical component (60; 600) including a lens and adapted to control a distribution of light emitted from the LED chip and transmitted through the encapsulation part, wherein the optical component (60; 600) is on the frame and is either integrally formed with the frame or provided separately from the frame; a dome-shaped color-changing member formed with an optically transparent material and a fluorescent material excited by light emitted from the LED chip and adapted to emit light of a color different from a color of the light emitted from the LED chip, and placed to surround the optical component (60; 600) and the frame (40, 400) on the one side of the wiring board, such that an air layer is formed between the color-changing member and a light output surface of the optical component (60, 600), wherein the distance between the light output surface of the optical component and an inner surface of said color-changing member is constant in a normal direction at all positions in the light output surface of the optical component; wherein said color-changing member is formed such that its thickness along the normal direction is constant at all positions; a metal fixture body on which light-emitting device is held; and an insulating layer having electrical insulating properties and being interposed between the heat transfer plate and the fixture body to thermally couple the same, wherein the light-emitting device is bonded to the fixture body with the insulating layer interposed therebetween. a light-emitting device that includes an LED chip, a heat transfer plate made of a thermally conductive material and having one side on which the LED chip is mounted, a wiring board having on one side a patterned conductor for supplying an electric power to the LED chip, being bonded to an LED chip mount-side of the heat transfer plate, and being formed with an exposure part through which the LED chip mount-side on the heat transfer plate is exposed, an encapsulation part in which the LED chip is encapsulated on the one side of the wiring board; a frame in form of a cylinder (40; 400) provided to surround the LED chip on the one side of the wiring board, wherein the encapsulation part is provided inside the frame (40; 400); an optical component (60; 600) including a lens and adapted to control a distribution of light emitted from the LED chip and transmitted through the encapsulation part, wherein the optical component (60; 600) is on the frame and is either integrally formed with the frame or provided separately from the frame; a dome-shaped color-changing member formed with an optically transparent material and a fluorescent material excited by light emitted from the LED chip and adapted to emit light of a color different from a color of the light emitted from the LED chip, and placed to surround the optical component (60; 600) and the frame (40, 400) on the one side of the wiring board, such that an air layer is formed between the color-changing member and a light output surface of the optical component (60, 600), wherein the distance between the light output surface of the optical component and an inner surface of said color-changing member is constant in a normal direction at all positions in the light output surface of the optical component; wherein said color-changing member is formed such that its thickness along the normal direction is constant at all positions; a metal fixture body on which light-emitting device is held; and an insulating layer having electrical insulating properties and being interposed between the heat transfer plate and the fixture body to thermally couple the same, wherein the light-emitting device is bonded to the fixture body with the insulating layer interposed therebetween.