PROBLEM TO BE SOLVED: To provide a smoking agent that keeps excellent effect of smoking treatment even after preservation.SOLUTION: A smoking agent contains (A) component: agent including silver, (B) component: organic foaming agent, (C) component: surfactant of 3-10 mass%, and (D) component: binder. The mass ratio represented by the (B) component/the (C) component is 5-30, and the mass ratio represented by the (D) component/the (C) component is 0.3-2.5.