To improve the controlling effects of anthranilamide compounds against pests. A pesticidal composition comprising, as active ingredients, an anthranilamide compound or its salt, and a polyoxyalkylene phosphoric acid ester surfactant, and a method for controlling a pest by using such a composition, are provided. Further, a method for improving the pesticidal effects of an anthranilamide compound or its salt, as an active ingredient, by means of a polyoxyalkylene phosphoric acid ester surfactant, is provided.
