PROBLEM TO BE SOLVED: To provide a volatilization container capable of simply performing the switching operation from a tightly closed state before use to a volatilizable state after opening, and capable of easily distinguishing the tightly closed state and the volatilizable state.SOLUTION: There is provided a volatilization container comprising a container body 1, an inside plug body tightly closing the container body 1, and an overlaying cap 40 having a volatilization hole 45 and mounted rotatably mounted to the head of the inside plug body. The inside plug body has: a first inside plug 10 having a sleeve 12 through which a volatile agent passes and a window part 15, and mounted to a mouth cylindrical part 2 a second inside plug 20 having a blocking piece 26 blocking the window part 15 and a coupling inside plug 30 connecting the first and second inside plugs. Besides, a weakened part 25 breakably connecting the blocking piece 26 is formed on the periphery of the blocking piece 26, and a locking mechanism which breaks the weakened part 25 when rotating the overlaying cap 40 and deforms the blocking piece 26 to make the window part 15 expose is provided between the overlaying cap 40 and the second inside plug 20.SELECTED DRAWING: Figure 3
