PROBLEM TO BE SOLVED: To provide a photocatalyst device capable of attaining the improvement of gas decomposition capacity and the improvement of throughput.SOLUTION: Provided is a photocatalyst device comprising: a light source part having a light emitting device a photocatalytic part provided so as to be confronted with the light source part and having photocatalytic particles and a projecting part provided at the outside than either edge part of the photocatalytic part in a direction crossed with a direction in which the light source part and the photocatalytic part are confronted. The projecting part has the first slant tilted to a direction separated from the photocatalytic part in the direction at which the light source part and the photocatalytic part are confronted as it goes to the tip side.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】ガス分解性能の向上と、処理能力の向上を図ることができる光触媒装置を提供することである。【解決手段】実施形態に係る光触媒装置は、発光素子を有する光源部と;前記光源部と対峙させて設けられ、光触媒粒子を有する光触媒部と;前記光源部と前記光触媒部が対峙する方向と交差する方向において、前記光触媒部の一方の端部よりは外側に設けられた突起部と;を具備している。 前記突起部は、前記外側に向けて突出し、先端側に向かうに従い、前記光源部と前記光触媒部が対峙する方向において、前記光触媒部から離れる方向に傾斜する第1の斜面を有する。【選択図】図1