PROBLEM TO BE SOLVED: To provide an impression material comprising an alginate base material and a curing material, the impression material achieving excellent impression accuracy and excellent operability.SOLUTION: The impression material comprises an alginate base material and a curing material, the curing material comprising a poorly water-soluble liquid compound and a polyether in the mass ratio of 50/50-98/2 between the poorly water-soluble liquid compound and the polyether.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】アルギン酸塩系基材と硬化材とを含む印象材であって、良好な印象精度とともに良好な操作性を可能にする印象材を提供する。【解決手段】アルギン酸塩系基材と硬化材とを含む印象材であって、該硬化材が、難水溶性液状化合物及びポリエーテルを、50/50~98/2の難水溶性液状化合物/ポリエーテル質量比で含む、印象材。【選択図】なし