Disclosed is a chemical agent volatizer for volatizing a formula solution housed within a container, that is provided with a volatizing part capable of locally displaying a design with an arbitrary shape. From the start of use in which the volatizing part (6b) is exposed to air by pulling up a support frame, the formula solution is repelled by a design display area (100). As a result, there is a distinct contrast between the color of the pigment of the formula solution that has been absorbed in the volatizing part (6b) and the color of the design display area (100), and a flower design is able to stand out clearly on the volatizing part (6b).
