A multi-layer wiring board without a core substrate includes: a multi-layer laminated structure; first terminals provided on a front surface of the multi-layer laminated structure; second terminals provided on a rear surface of the multi-layer laminated structure; terminal pins bonded to a corresponding one of the second terminals, wherein each of the terminal pins is formed in a nailhead shape that includes a shaft portion and a head portion, and a diameter of the head portion is larger than that of the shaft portion; and a reinforcing plate which has pin insertion openings formed at positions corresponding to the terminal pins and which is fixed to the rear surface, wherein the diameter of the pin insertion openings is smaller than the diameter of the head portion and is larger than the diameter of the shaft portion.