A tetrazolinone compound represented by formula (1): wherein R 1 , R 2 , R 3 , R 6 , R 7 , R 8 , R 9 , R 10 , and R 11 each independently represents a C1-C6 alkyl group optionally having one or more halogen atoms, etc.; R 4 , and R 5 each independently represents a hydrogen atom, etc.; Q represents any one group selected from Group P 2 (provided that the group optionally has one or more atoms or groups selected from Group P 1 ) ; and 3.X represents an oxygen atom or a sulfur atom, has excellent control activity against pests.