To provide self stain-proof sound absorbing material having excellent sound absorbing performance and stain-proof performance and its manufacturing method, and a sound absorbing structure such as a soundproof wall or outer facing material formed by the use of such self stain-proof sound absorbing material.

This is a self stain-proof sound absorbing material A made of an inorganic fiber sheet 1 of bulk density of 0.2-2 g/cm3 having a stain-proof layer in which photocatalyst is supported at least on one face. The manufacturing method of the self stain-proof sound absorbing material is constituted so that the photocatalyst is supported with the surface of the inorganic fiber, next the inorganic fiber is molded into a nearly uniform flat sheet, and a porous supporting plate 2 made of metal plate is stuck on the one face of the obtained inorganic fiber sheet 1. Further, the sound absorbing structure is constituted so that the one part or the whole part of a structure main body is constituted of such self stain-proof sound absorbing material A, and the stain-proof layer of the sound absorbing material is faced at least the noise incoming side of the structure main body.