A compound represented by formula (I) wherein Het1 represents Het1-1 Het1-2 Het1-3 Het1-4 or Het1-5 R1 represents a halogen atom or the like R1a and R4 independently represent a C1-C4 linear hydrocarbon group having at least one halogen atom X1 represents NR30 an oxygen atom or a sulfur atom X2 represents a nitrogen atom or CR31 X3 represents a nitrogen atom or CR32 X4 represents a nitrogen atom or CR33 A1 represents a nitrogen atom or CR9 and the combination of A2 A3 and A4 represents a combination in which A2 is CR6 A3 is CR7 and A4 is CR8 a combination in which A2 is a nitrogen atom A3 is CR7 and A4 is CR8 a combination in which A2 is CR6 A3 is a nitrogen atom and A4 is CR8 or a combination in which A2 is CR6 A3 is CR7 and A4 is a nitrogen atom or a N-oxide compound thereof has an excellent control effect agaist arthropod pests.
