PROBLEM TO BE SOLVED: To provide a chemical volatilization body which improves an air flow inside the chemical volatilization body and has a structure in which the air is easy to flow.SOLUTION: A chemical volatilization body includes a three-dimensional structure 1 including three-dimensional mesh including fibrous materials including normal-temperature volatile pyrethroid insecticidal components, with a porosity of the three-dimensional structure 1 being 70-99%.