Curing agent capable of improving storability, method for producing same, and curable resin composition using same

The purpose of the present invention is to provide: a curing agent which is capable of suppressing changes in viscosity of a single-component curable resin composition and does not affect the physical properties of a cured product; and a method for producing the curing agent. The treated curing agent is obtained by mixing and dispersing the following components (A) to (C) and then removing the component (B). Component (A): a curing agent that is solid at 25 DEG C. Component (B): a solvent that does not dissolve component (A) Component (C): a metal alkoxide compound. 本发明的目的在于提供一种能够抑制经单组分化的固化性树脂组合物的粘度变化且不对固化物物性带来影响的固化剂及其制造方法。一种经处理的固化剂，其是将下述(A)～(C)成分混合并使其分散之后将(B)成分除去而得到的。(A)成分：在25℃下为固体的固化剂，(B)成分：不溶解(A)成分的溶媒，(C)成分：金属醇盐化合物。