Sound-damping partition

(57) Especially summary book invention relates to the insulation partition wall applied to the internal structure of a building about an insulation partition wall. A partition wall is arranged in the broad side (12, 14) where the wooden frame-like substructure part (10) and the substructure part (10) have countered mutually, and consists of two exterior parts (18, 20) which form the hollow space (16) filled up with air and an insulator (36). According to the present invention, in order to attain air sound insulation by an easy means, it fixes to a substructure part (10) using the adhesives bead part (32) of the thick wall of an exterior part which is flexible and elastic in (20) on the other hand, and a clamp is used for a substructure part (10) and other exterior parts (18) are firmly fixed to it.