PROBLEM TO BE SOLVED: To provide a photocatalyst structure suppressed in migration of a plasticizer contained in a resin material and showing high photocatalytic activity, a photocatalyst functional product for using the same, and an antiviral functional product.SOLUTION: A photocatalyst structure includes a resin base material, an underlayer, and a photocatalyst layer, wherein the underlayer is directly laminated on a surface of the resin base material containing 1-100 pts.mass of a plasticizer having 700 or more of molecule weight relative to 100 pts.mass of the resin base material, the photocatalyst layer is directly laminated on a surface of the underlayer, and a resin of the resin base material is a polyvinyl chloride resin.COPYRIGHT: (C)2013,JPO&INPIT【課題】樹脂基材に含まれる可塑剤の移行が抑制されて、且つ高い光触媒活性を示す光触媒構造体、これを用いた光触媒機能製品および抗ウイルス性機能製品を提供する。【解決手段】樹脂基材と、下地層と、光触媒層とを含む光触媒構造体であって、分子量700以上の可塑剤を樹脂基材100質量部に対して1~100質量部含有する樹脂基材の表面に下地層が直接積層され、この下地層の表面に光触媒層が直接積層されてなり、かつ前記樹脂基材の樹脂がポリ塩化ビニル系樹脂である。【選択図】なし
