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 represent independnetly of each other a hydrogen atom, a halogen atom or an C1-C3 alkyl group, etc.； R6 represents a halogen atom, an C1-C4 alkyl group, etc.； R7, R8 and R9 represent independnetly of each other a hydrogen atom, a halogen atom, etc.； and R10 represents an C1-C3 alkyl group, etc.] shows an excellent controlling efficacy on pests.本發明係提供具有優異的防治有害生物功效之化合物。式(1)之四唑啉酮化合物：[其中，Q表示選自下列群組之基：Q1、Q2、Q3或Q4：R1、R2、R3及R11各自獨立地表示鹵素原子、C1-C6烷基等；R4及R5各自獨立地表示氫原子、鹵素原子或C1-C3烷基等；R6表示鹵素原子、C1-C4烷基等；R7、R8及R9各自獨立地表示氫原子、鹵素原子等；以及R10表示C1-C3烷基等]對有害生物顯示優異的防治功效。
