The present invention relate to a novel silane coupling agent and a medical and/or dental curable composition comprising the same. It is an object of the present invention to provide a novel silane coupling agent that imparts high affinity to a radical polymerizable monomer, thereby imparting high mechanical strength, flexibility and durability when used for a medical and/or dental curable composition, and an inorganic filler surface-treated with the novel silane coupling agent and a novel medical and/or dental curable composition. A silane coupling agent including repeating units such as a urethane bond and polyethylene glycol (ether bond) at a specific position is used.本發明係關於一種新穎矽烷偶合劑以及包含其之醫科齒科用硬化性組合物。本發明之目的在於提供一種賦予對自由基聚合性單體之較高之親和性，藉此於用於醫科齒科用硬化性組合物時賦予較高之機械強度、柔軟性及耐久性之新穎之矽烷偶合劑；及藉由新穎之矽烷偶合劑進行過表面處理之無機填充劑；以及新穎之醫科齒科用硬化性組合物。本發明使用於特定之位置具有胺基甲酸酯鍵及聚乙二醇(醚鍵)等重複單元之矽烷偶合劑。
