A light emitting diode (LED) lamp comprises a casing part inserted into the region on which the lamp is installed. A PCB part is seated on the casing part in two stage. A connector part connects and fixes the PCB part to the casing part to supply power to the PCB part. A cover part is disposed above the PCB part to protect the LED mounted on the PCB part. The casing part comprises a cover fixing part and a coupling protrusion is disposed on the cover part. The coupling protrusion is inserted and fixed into the cover fixing part. An adhesive is applied to the bottom surface of the coupling protrusion to insert the coupling protrusion into the cover fixing part, thereby firmly coupling the coupling protrusion to the cover fixing part.