Sound proofing cover for vehicle

A soundproofing cover absorbs noises, produced by a vehicle. It is fastened to a plurality of vehicle-side installation portions, and includes a cover body (1), composed of a polymer foamed substance, and a plurality of brackets (2), held integrally to the cover body (1). The respective brackets (2) have an installation portion (21) and a holding portion (22). The installation portion (21) is to be fastened to the vehicle-side installation portions. The holding portion (22) is held and fastened integrally to the cover body (1). At least two of the installation portions (21) constitute a datum bracket (3), connected by one of the holding portions (22) shared commonly. The positioning accuracy can be improved in the installation of the soundproofing cover to the vehicle-side installation portions so that the installation operability can be upgraded. In addition, the increment of the weight can be kept minimum so that the lightweighting requirement can be satisfied.