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 P1, provided that a heteroatom constituting the heterocyclic group is a nitrogen atom, and the number of nitrogen atom is 1, 2, or 3； R1, R2, R3, and R11 each represents a C1-C6 alkyl group optionally having one or more atoms or groups selected from Group P2； R4 and R5 each represents a hydrogen atom, etc.； R6 represents a C1-C6 alkyl group optionally having one or more halogen atoms, etc.； R7, R8, and R9 each represents a hydrogen atom, etc.； and X represents an oxygen atom or a sulfur atom, has excellent control activity against pests.
