To provide a sound absorptive object, which prevents an infiltration to the sound absorptive object of moisture such as rain in the case of a use in the outdoors or the like, in which sound absorbing qualities are not damaged by a waterproof means and which is lightweight and has excellent workability.

The sound absorptive object is composed of fiber aggregate 2, and molded and solidified by a binder having a fibrous form. The surface 5 of the fiber aggregate 2 has a coating-treated layer 6 water-repellent treated by a ceramic water-repellent agent. Since moisture such as rain is repelled without having an effect on sound-absorbing qualities, the deterioration of the sound-absorbing qualities of the sound absorptive object 1 due to the infiltration of moisture can be prevented, and workability is also improved without largely increasing weight.