Problem to be solved: to provide a one liquid type dental adhesive composition which does not require light irradiation at the stage before filling of the filling material.The dental adhesive composition is used to bond the photo curable filler material containing aromatic amines to the tooth.The dental adhesive composition is of one liquid type, and has a (a) polymerizable monomer of 100 parts by weight, (b) divalent copper compound of 0.05 mass part to 2 mass parts, (c) peroxide, (d) photopolymerization initiator, (1) to 50 parts by weight (E) water, and (10) to 300 parts (f) of water (1) Contains an organic solvent and does not contain a reducing agent.(a) the polymerizable monomer comprises an (1) acidic group containing polymerizable monomer having 1 to 40 mass parts.(c) the peroxide comprises at least one (1) to 10 mass (1) organic peroxide and at least 0.01 mass to 5 mass (C2) inorganic peroxides.(d) photopolymerization initiators include (0.1) bisacylphosphine oxide (0.1) from 10 mass to 10 parts by weight.Diagram【課題】充填材料の充填前の段階での光照射が不要な１液型の歯科用接着性組成物を提供する。【解決手段】歯科用接着性組成物は、芳香族アミンを含有する光硬化型の充填材料を歯質に接着するために用いられる。上記歯科用接着性組成物は、１液型であり、１００質量部の（Ａ）重合性単量体と、０．０５質量部～２質量部の（Ｂ）二価の銅化合物と、（Ｃ）過酸化物と、（Ｄ）光重合開始剤と、１質量部～５０質量部の（Ｅ）水と、１０質量部～３００質量部の（Ｆ）有機溶媒と、を含有し、かつ還元剤を含有しない。（Ａ）重合性単量体は、１質量部～４０質量部の（ａ１）酸性基含有重合性単量体を含む。（Ｃ）過酸化物は、０．１質量部～１０質量部の（ｃ１）有機過酸化物と、０．０１質量部～５質量部の（ｃ２）無機過酸化物と、の少なくとも一方を含む。（Ｄ）光重合開始剤は、０．１質量部～１０質量部の（ｄ１）ビスアシルフォスフィンオキサイドを含む。【選択図】図２
