A thiazole compound represented by Formula (1):wherein R1 represents a C1-C4 alkyl group optionally having one or more fluorine atoms, R2 represents a hydrogen atom etc., R3 and R4 are the same or different and each represents a hydrogen atom etc., Ar represents a phenyl group optionally having one or more atoms or groups selected from the group A etc., and n represents 1 or 2 has excellent control activity against pests.
