An ester compound represented by formula (1): wherein R represents hydrogen, fluorine, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkoxymethyl, or C1-C4 alkylthiomethyl R represents hydrogen or methyl, R represents hydrogen or C1-C4 alkyl, and R represents hydrogen or C1-C4 alkyl has an excellent pest control effect and is therefore useful as an active ingredient of a pest control agent.