A water-borne aerosol composition containing an oil soluble insecticidal component (A), a hydrophobic organic solvent (B), water (C), a non-ionic surfactant (D) and a propellant (E), wherein the oil soluble component (A) is 4-methoxymethyl-2,3,5,6-tetrafluorobenzyl 3-(2-cyano-1-propenyl)-2,2-dimethylcyclopropanecarboxylate and wherein the non-ionic surfactant (D) has a HLB in the range of 4.1 to 7.0, shows an excellent insecticidal activity and is useful.
