A LED lamp includes: a first base body including a first mating portion; alight emitting unit including a printed circuit board and a LED chip; a second base body including a second mating portion; a plug disposed in the first base body, and including an insulating tube, a first electrical contact formed on an inner surface of the insulating tube, and a second electrical contact formed on an outer surface of the insulating tube; a socket formed in the second base body and including a third electrical contact to electrically contact the first electrical contact, and a fourth electrical contact to electrically contact the second electrical contact; a first wire electrically connecting a positive electrode of the LED chip to the first electrical contact; and a second wire electrically connecting a negative electrode of the LED chip to the second electrical contact.