The present invention provides a compound having an excellent efficacy for controlling pests. A tetrazolinone compound of a formula (1): [wherein Q represents a group selected from the following group: Q1, Q2, Q3 or Q4: R1, R2, R3 and R11 represent independently of each other a halogen atom, an C1-C6 alkyl group, etc.； R4 and R5 represents independently of each other a hydrogen atom, a halogen atom or an C1-C3 alkyl group, etc.； R6 represents an C2-C4 alkynyl group or a C3-C6 cycloalkyl group, etc.； R7, R8 and R9 represent independently of each other a hydrogen atom, a halogen atom, etc.； R10 represents an C1-C3 alkyl group, etc.； and X represent an oxgen atom, etc.] shows an excellent controlling efficacy on pests.本發明提供用於防治有害生物之具優異功效之化合物；具下式(1)之四唑啉酮化合物對有害生物顯現優異之防治功效：[其中Q表示選自下述群組之基團：Q1、Q2、Q3或Q4：R1、R2、R3與R11彼此獨立地表示鹵原子、C1-C6烷基等；R4與R5彼此獨立地表示氫原子、鹵原子或C1-C3烷基等；R6表示C2-C4炔基或C3-C6環烷基等；R7、R8與R9彼此獨立地表示氫原子、鹵原子等；R10表示C1-C3烷基等；及X表示氧原子等]。
