PROBLEM TO BE SOLVED: To provide a curable composition for dentistry which has high adhesive property to a dentine, and excellent in storage stability, and a cement for dentistry formed of the composition.SOLUTION: There is provided a curable kit (αe) for dentistry comprising at least, as components for forming a curable composition (e) for dentistry, a first agent and a second agent, the first and second agents include a polymerizable monomer (ae), the first agent includes an aromatic amine compound (be) having a non-aromatic carbonyl group and an organic sulfinic acid compound (ce) having an electron attractive group, the second agent includes a polymerization initiator (de), and variation of a cure time of a mixture of the first and second agents before and after storage of the first agent under an environment of 75°C for 24 hours, is within 3 minutes in the curable kit (αe) for dentistry.SELECTED DRAWING: None【課題】歯質に対して高い接着性を有しつつ、保存安定性に優れた歯科用硬化性組成物、及び該組成物からなる歯科用セメントを提供する。【解決手段】歯科用硬化性組成物（ｅ）となる成分として第１剤と第２剤とを少なくとも含む歯科用硬化性キット（αｅ）であり、第１剤及び第２剤に、重合性モノマー（ａｅ）が含まれ、第１剤に非芳香族性カルボニル基を有する芳香族性アミン化合物（ｂｅ）及び電子吸引基を有する有機スルフィン酸化合物（ｃｅ）が含まれ、第２剤に重合開始剤（ｄｅ）が含まれており、第１剤を７５℃環境下で２４時間保管する前後における第１剤及び第２剤の混合物の硬化時間の変動が３分以内である歯科用硬化性キット（αｅ）。【選択図】なし
