PURPOSE: An LED lighting device is provided to diffuse light emitted by an LED device by the additional installation of a polyhedral crystal member. CONSTITUTION: A main body cylinder unit(100) forms a penetration hole. A crystal member(200) is inserted into the bottom of the main body cylinder unit. An LED substrate is installed inside the main body cylinder unit. One or more LED elements are installed on the LED substrate. A substrate combining unit(400) is inserted into the upper side of the main body cylinder unit. The substrate combining unit is combined with a female screw unit of the main body cylinder unit by a bolt. A lens member is additionally installed between the LED substrate and the crystal member. The lens member diffuses light emitted in the LED elements to the crystal member.
