PROBLEM TO BE SOLVED: To provide a dental curable composition which has excellent adhesiveness as a dental material and suitable curing properties and provides a cured product which causes no discoloration and has excellent storage stability in a composition obtained by polymerizing a radical polymerizable monomer by reacting an organic peroxide, a vanadium compound and an α-hydroxycarbonyl compound.SOLUTION: There is provided a dental curable composition which comprises a radical polymerizable monomer (a1) having no acidic group, a hydroperoxide compound (a2), a vanadium compound (a3) and glycolic acid represented by the following formula (I) (where, R represents a hydrogen atom, an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, an alkenyl group which may have a substituent, an aralkyl group or a monovalent heterocyclic group containing an oxygen atom, a sulfur atom or a nitrogen atom) or a derivative thereof (a4).SELECTED DRAWING: None【課題】有機過酸化物、バナジウム化合物及びα－ヒドロキシカルボニル化合物を反応させてラジカル重合性単量体を重合させる組成物において、歯科材料としての接着性に優れ、適切な硬化性を有し、かつ硬化物が変色せず保存安定性に優れた新規な歯科用硬化性組成物を提供する。【解決手段】酸性基を有しないラジカル重合性単量体（ａ１）、ハイドロパーオキサイド化合物（ａ２）、バナジウム化合物（ａ３）及び下記式（Ｉ）：（式中、Ｒは、水素原子；置換基を有していてもよいアルキル基；置換基を有していてもよいシクロアルキル基；アリール基；置換基を有していてもよいアルケニル基；アラルキル基；又は、酸素原子、硫黄原子もしくは窒素原子を含む一価の複素環基を示す。）で表されるグリコール酸又はその誘導体（ａ４）を含有する歯科用硬化性組成物。【選択図】なし
