A tetrazolinone compound represented by formula (1): wherein X represents CR 6 or a nitrogen atom, R 1 , R 2 , R 3 , R 4 , and R 6 each independently represents a halogen atom, a C1-C4 alkyl group optionally having one or more halogen atoms, etc., and R 5 represents a C1-C4 alkyl group optionally having one or more halogen atoms, a C3-C4 cycloalkyl group optionally having one or more halogen atoms, etc., has excellent control activity against pests.
