To provide an illumination member having highly reliable waterproof structure.

An electric bulb is equipped with a joint part 10, a first waterproof sealing cover 12 covering the near point from the outside and a second waterproof sealing cover 16 arranged so as to adhere on the outside of the first waterproof sealing cover 12 moreover. The second waterproof sealing cover 16 extends between the electric bulb 1 and a conductor 2 with the joint part 10 at the intermediate position, wherein one end 16a of the second waterproof sealing cover 16 adheres to a bulb 7 of the outer peripheral face of the electric bulb 1 and the other end 16b adheres to the outer peripheral face 2c of a insulating tube 2b of the conductor 2. The one end 12a and the other end 12b of the first waterproof sealing cover 12 are located backward to the one end 16a and the other end 16b of the second waterproof sealing cover 16, and both end 12a and 12b of the first waterproof sealing cover 12 are covered with the inner face 16c of the second waterproof sealing cover 16.