6123465A tetrazolinone compound shown by formula (1) (in the formula X represents CR or a nitrogen atom R R R R and R each independently represent a halogen atom C1 C4 alkyl group optionally having one or more halogen atoms or the like and R represents a C1 C4 alkyl group optionally having one or more halogen atoms C3 C4 cycloalkyl group optionally having one or more halogen atoms or the like) has an exceptional control effect against pests.