[Problems to be Solved] To provide a dental chemical polymerization catalyst comprising, particularly, a combination of an aryl borate compound and an acid compound, and exhibiting not only excellent polymerizing activity but also storage stability. [Means for Solution] A dental chemical polymerization catalyst comprising (A) an aryl borate compound； (B)an acid compound； (C) a vanadium compound having a valency of +IV or +V； and (D) a phenol type compound represented by the following general formula (1), wherein X 1 , X 2 and X 3 are each,a hydrogen atom or a substitutent selected from the group consisting of a hydroxyl group, an alkoxy group and an alkyl group. [Selected Drawing] None
