To perform sound insulation, sound absorption and ventilation all together through a soundproof wall by adding air permeability to the soundproof wall.

A plurality of sound absorbing members 11, 21 are arranged in parallel between adjacent posts 2 of the soundproof wall 1 to constitute a pair of wall surfaces 10, 20, and both wall surfaces 10, 20 are arranged facing each other to form a ventilating space 3 in between. The plurality of sound absorbing members 11, 21 are arranged with clearances to each other and also in such a manner that the positions of the respective clearances are shifted between the pair of wall surfaces 10, 20, thus providing vent holes 12, 22 communicating with the ventilating space 3, between the sound absorbing members 11, 21 of the wall surfaces 10, 20. The soundproof wall 1 ventilates between both surfaces through the vent holes 12, 22 and the ventilating space 3, absorbs sound by the sound absorbing members 11, 21, and absorbs sound by the sound absorbing members 11, 21 on both sides even in the ventilating space 3.