PROBLEM TO BE SOLVED: To provide a water purification member which realizes efficient sterilization and purification of an aqueous medium while suppressing insolubilization of organic substances or ions in the aqueous medium. SOLUTION: A porous body and a metal compound supported on the porous body and having a metal atom and a hydrocarbon group are bonded to the surface via an oxygen atom and have absorption at a wavelength of 500 nm in a visible absorption spectrum. A water purification member comprising photocatalytic particles composed of titanium-based compound particles having an absorption peak at 2700 cm to 1 to 3000 cm-1 in an infrared absorption spectrum. [Selection diagram] Fig. 1【課題】水系媒体中の有機物又はイオンの不溶化を抑制しつつ、効率のよい水系媒体の殺菌浄化を実現する水質浄化部材を提供する。【解決手段】多孔質体と、前記多孔質体に担持され、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ける波長５００ｎｍに吸収を持ち、赤外吸収スペクトルにおける２７００ｃｍ－１～３０００ｃｍ－１に吸収ピークを持つチタン系化合物粒子からなる光触媒粒子と、 を有する水質浄化部材。【選択図】図１
