A fused heterocyclic compound represented by formula (1) :wherein R1 represents a C1 to C6 alkyl group optionally having one or more halogen atoms or one or more cyclopropyl groups or the like R2 and R4 represent a hydrogen atom or the like R3 represents a C1 to C6 alkyl group optionally having one or more halogen atoms or the like n and m each represent 0, 1 or 2 and ring J represents ring J1 or ring J2 of the following formula:wherein A1 and A2 represent N or the like, G represents a C1 to C3 perhaloalkyl group or the like, R6 and R7 represent a C1 to C6 alkyl group optionally having one or more halogen atoms or the like, and p represents 0, 1 or 2, oran N-oxide thereof has an excellent pest controlling effect.
