A pesticidal aerosol composition, containing 3-phenoxybenzyl ester compound represented by Formula (I): wherein, X represents a hydrogen atom or a cyano group; Z represents a hydrogen atom or a fluorine atom; and R1 and R2 each independently represent a hydrogen atom, a C1-C3 alkyl group that may be substituted with halogen atoms, or a halogen atom; 4-methoxymethyl-2,3,5,6-tetrafluorobenzyl 3-(2-cyano-1-propenyl)-2,2-dimethylcyclopropanecarboxylate, an organic solvent, and a propellant has an excellent pesticidal activity.