A fused heterocyclic compound represented by formula (1) has an excellent pest control effect.In the formula, R1, R2, R3, R4 and R5 may be the same or different, and each represents a C1-C6 chain hydrocarbon group which may have one or more atoms or groups selected from group X, etc.； R6 represents a C1-C6 chain hydrocarbon group which may have one or more atoms or groups selected from group W, etc.； R7, R8, R9, R10, and R11 may be the same or different, and each represents a C1-C6 chain hydrocarbon group which may have one or more atoms or groups selected from group X, etc.； Q represents an oxygen atom or a sulfur atom； and each of m and n represents 0, 1 or 2.
