A tetrazolinone compound represented by formula (1):wherein X represents CR6 or a nitrogen atom, R1, R2, R3, R4, and R6 each independently represents a halogen atom, a C1-C4 alkyl group optionally having one or more halogen atoms, etc., and R5 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.
