PROBLEM TO BE SOLVED: To provide a room sterilization structure excellent in stability, reliability and efficiency of room purification, capable of surely and effectively separating and removing various harmful materials such as volatile organic compounds, dust, mold, house dust, powder dust, pollen or the like generated in a room and virus such as Norovirus or influenza by using function of a photocatalyst effectively and effectively suppressing generation of various health damage such as hospital infection, food poisoning, influenza by purifying a space in the room.SOLUTION: A room sterilization structure has a floor part photocatalyst layer formed on a floor surface in a room, a wall part photocatalyst layer formed in a range by at least height of 30 cm from a lower edge of a wall surface in the room, and a filter part photocatalyst layer formed on at least one surface of an air cleaning filter of an air cleaner arranged in the room.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】揮発性有機化合物(VOC)や室内で発生する埃、カビ、ハウスダスト、粉塵や花粉等の各種粒子状物質、ノロウィルスやインフルエンザ等のウィルスといった各種有害物質を光触媒の機能を有効に利用して確実かつ効率的に分解除去することができ、室内の空間を浄化して、院内感染、食中毒、インフルエンザ等の様々な健康被害の発生を効果的に防止することができる空間浄化の安定性、確実性、効率性に優れた室内除菌構造の提供。【解決手段】室内の床面に形成された床部光触媒層と、室内の壁面の下端から少なくとも高さ30cmまでの範囲に形成された壁部光触媒層と、室内に配設される空気清浄機の空気清浄フィルタの少なくとも一方の表面に形成されたフィルタ部光触媒層と、を備えている。【選択図】図2