An LED lighting apparatus is disclosed. The lighting apparatus according to an exemplary embodiment of the present invention includes: a main cover with an elongated pipe shape having a cross-section formed of a closed curve line and both ends of a length direction formed to be open; an external frame sliding-coupled to an external surface of the main cover along a length direction of the main cover; an inner frame having a shape extending in a direction parallel to the length direction of the main cover and sliding-coupled to an internal surface of the main cover along with the length direction of the main cover to be positioned at the inner space of the main cover; and a close-and-seal cover closing and sealing both open ends of the main cover to close and seal the inner space of the main cover, wherein the bottom surface of the inner frame supports an emitted LED, and the close-and-seal cover is coupled to the external frame and the inner frame.