TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred material : The pair of two-dimensional reticular skeletons have the same shape. The three-dimensional fiber skeleton is made of polyester, polyamide, polypropylene fiber or a complex fiber of these. The pair of the two-dimensional reticular skeletons are formed by twisting two or more fibers and together cross-linking countless number of single or multiple threads. A binder layer is formed in the three-dimensional fiber skeleton, and the deodorant is adhered by impregnating the three-dimensional fiber skeleton with a slurry obtained by kneading the binder and the deodorant and then drying. Air-permeable layers are formed on the front and back surfaces and inside the filter material. The filter material comprises this deodorant filter on which a dust-collecting layer is laminated. Hence the filter material has a dust collecting function.Preferred deodorant : The deodorant is one or more substances selected from coconut shell activated charcoal, wood activated charcoal, spherical petroleum pitch activated charcoal, natural zeolite, chelate resin, chelate compound, catalyst carried on a porous body, etc. Two filter layers are laminated using a non-adhesive means such as clips or frames. A renewable filter material comprises a gas-adsorbing layer formed by adhering a deodorant having an ion-exchanging function on the surface of the three-dimensional fiber skeleton. The deodorant having the ion-exchange function is an SO2- type, Zr-type, Ti-type, Pb-type or Sn-type inorganic positive ion-exchange deodorant or a ZnO-, Al- or Bi-type inorganic negative ion exchange deodorant. EXAMPLE - 48 polyester fibers were twisted to form a countless number of connecting threads. A pair of two-dimensional reticular skeletons were formed using many hexagonal lattices made of the above threads. The two-dimensional reticular skeletons were disposed in parallel and spaced 5 mm apart from each other, and then a three-dimensional fiber skeleton was formed connecting this pair of two dimensional reticular skeletons. A filter material was formed using this three-dimensional fiber skeleton. A slurry was prepared by kneading a binder AE-932 and coconut activated charcoal ( 300 mesh ). The filter material was impregnated with this slurry and dried so as to obtain a deodorant filter material having a honeycomb structure. This deodorant filter had excellent deodorizing performance.