Problem to be solved: to provide a photopolymerization initiator capable of improving the curing rate of the photocurable composition and bending strength of the cured product of the photocurable composition.Solution: photopolymerization initiator containing a benzodioxol compound having a specific substituent on the aromatic ring, and photo curable composition using the photopolymerization initiator, dental material, and cured product.No selection【課題】光硬化性組成物の硬化速度及び光硬化性組成物の硬化物の曲げ強度を向上させることができる、光重合開始剤を提供する。【解決手段】芳香環上に特定の置換基を有する、ベンゾジオキソール化合物を含む光重合開始剤及び該光重合開始剤を用いた光硬化性組成物、歯科材料、硬化物。【選択図】なし
