To provide a sound insulation wall body inexpensive in manufacturing and installation cost without completely interrupting the line of vision of a driver or a passenger while providing sufficient sound insulation effect.

The sound insulation wall body (A) is arranged along a road or a railway. The sound insulation wall body is provided with a frame body (8) and a plurality of sound insulation cylinders (1) attached to the frame body (8) by providing a gap, and provided with a porous layer (4) capable of venting in the outer peripheral face. A plurality of sound absorption chambers (R) is provided on the inner peripheral side of the porous layer (4). The sound absorption chamber (R) of at least a part has a venting hole (6) between an adjacent other sound absorption chamber (R).