The present invention provides a compound that have excellent harmful arthropod controlling effects, the compounds being represented by formula (I) [wherein Q represents a group represented by formula Q1 or the like, Z represents an oxygen atom or a sulfur atom, A1 represents a nitrogen atom or CR6a, A2 represents a nitrogen atom or CR6b, A3 represents a nitrogen atom or CR6c, A4 represents CR1a or the like, A5 represents a nitrogen atom or CR6e or the like, A6 represents a nitrogen atom or CR6f, R6a represents a hydrogen atom or the like, R6b represents a C1-C6 chain hydrocarbon group or the like, R6c, R6e, R6f are identical to or different from each other, and each represents a C1-C6 chain hydrocarbon group or the like, R1a represents a C1-C6 chain hydrocarbon group or the like, R2 represents a C1-C6 chain hydrocarbon group or the like, R3 represents a C1-C6 chain hydrocarbon group or the like, and n is 0, 1 or 2] or its N oxide compound.