To provide a greening sound-proof wall which can suppress noise diffusion by attenuating noise, and improves beauty to be capable of producing a restful atmosphere.

In this greening sound-proof wall 10, a plurality of greening units 20 are fixed to the noise-source side of a sound insulating board 12 which is fixed to a support 11, and a water supply pipe 17 is arranged above the greening units 20. The greening unit 20 is equipped with: a box-shaped container 21, the front face of which serves as an opening and the bottom face and side face of which are formed of permeable members; a thin mat-shaped soilless medium 23 which is housed in the container 21; and a retaining member 25 for preventing the medium 23 from slipping off.