PROBLEM TO BE SOLVED: To provide a composition for killing insect pest having high insecticidal effects by a cooling effect while maintaining sufficient safety.SOLUTION: There is provided a composition for killing insect pest, excluding insecticidal aerosol containing a petroleum solvent, containing dimethyl ether and myristic acid alkyl ester and no propellant other than dimethyl ether. The content of myristic acid alkyl ester is for example 0.1 to 10 mass% based on the content of dimethyl ether.SELECTED DRAWING: None