A tetrazolinone compound represented by formula (1): wherein Q represents a 6-membered aromatic heterocyclic group optionally having one or more atoms or groups selected from Group P 1 , provided that a heteroatom constituting the heterocyclic group is a nitrogen atom, and the number of nitrogen atom is 1, 2, or 3； R 1 , R 2 , R 3 , and R 11 each represents a C1-C6 alkyl group optionally having one or more atoms or groups selected from Group P 2 ； R 9 and R 5 each represents a hydrogen atom, etc.； R 6 represents a C1-C6 alkyl group optionally having one or more halogen atoms, etc.； R 7 , R 8 , and R 9 each represents a hydrogen atom, etc.； and X represents an oxygen atom or a sulfur atom, has excellent control activity against pests.
