PROBLEM TO BE SOLVED: To provide a medicament volatilization body in which an atmospheric temperature volatilization property pyrethroid-based insect proof component and a persistent perfume component having a boiling point of at least 250°C and at most 400°C are performed by volatilization to express an insect proof effect with aroma, and disappearance of the aroma is linked with a using telophase of a medicament volatilization body; and an insect proof method of a flight injurious insect using the medicament volatilization body.SOLUTION: A resin composition includes: an atmospheric temperature volatilization property pyrethroid-based insect proof component; and a persistent perfume component having a boiling point of at least 250°C and at most 400°C, preferably an insect proof component inclusion resin pellet that includes the atmospheric temperature volatilization property pyrethroid-based insect proof component and a perfume component inclusion resin pellet that includes the persistent perfume compone
