There is provided a nitrile compound having an excellent controlling effect on arthropod pests represented by the formula (I): wherein m represents in integer of 0 to 4； n represents an integer of 1 to 4； q represents an integer of 0 to 4； Q represents a C1-C4 fluoroalkyl group； Z represents an optionally substituted C2-C6 alkynyl group or a &boxH；N&mdash；OR3 group； R1 and R2 independently represent a monovalent C1-C4 chain hydrocarbon group optionally substituted with a halogen atom, etc.； and A represents an optionally substituted monovalent C1-C6 chain hydrocarbon group, etc.
