PROBLEM TO BE SOLVED: To provide a filter that can maintain its deodorant properties well.SOLUTION: A filter includes a paper filter body having a surface roughness of 1.0 μm or more and 10.0 μm or less, and a photocatalyst particle held on the paper filter body and having a surface to which a metal compound having a metal atom and a hydrocarbon group is bonded via an oxygen atom, the photocatalyst particle being formed of a titanium compound particle having absorption at wavelengths of 450 nm and 750 nm in a visible absorption spectrum.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2020,JPO&INPIT【課題】消臭維持性が高いフィルターを提供する。【解決手段】表面粗さが１．０μｍ以上１０．０μｍ以下の紙製フィルター本体と、前記紙製フィルター本体に担持され、金属原子及び炭化水素基を有する金属化合物が酸素原子を介して表面に結合し、かつ可視吸収スペクトルにおいて波長４５０ｎｍ及び７５０ｎｍに吸収を持つチタン化合物粒子からなる光触媒粒子と、を有するフィルター。【選択図】図３
