PROBLEM TO BE SOLVED: To provide a pest control composition having excellent control effect on pests.SOLUTION: A pest control composition comprises a tetrazolinone compound represented by formula (1) and the like, and one or more component selected from group A, group B, group C, group D, group E and group F [in the formula (1), R1 is C6-C16 aryl group or the like X1 is O or S R2 is H, alkyl or the like R4 and R5 independently represent H or the like R6-R9 independently represent C1-C12 alkyl group or the like R10 is C1-C6 alkyl group or the like Y1 is O or S Q1 is O, S or NR11.] Group A: bactericidal agent Group B: insecticide and miticide, Group C: herbicide, Group D: phytotoxicity reducing agent, Group E: plant growth regulator, and Group F: microbial material.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】有害生物に対する優れた防除効力を有する有害生物防除組成物を提供する。【解決手段】式(1)等で表されるテトラゾリノン化合物と、群A,群B,群C,群D,群E及び群Fから選ばれる1種以上の成分とを含有する有害生物防除組成物。〔R1はC6-C16のアリール基等;X1はO又はS;R2はH、アルキル等;R4及びR5は夫々独立に、H等;R6~R9は各々独立にC1-C12のアルキル基等;R10はC1-C6のアルキル基等;Y1はOまたはS;Q1はO、S又はNR11〕群A;殺菌剤、群B;殺虫剤、殺ダニ剤、群C;除草剤、群D;薬害軽減剤、群E;植物成長調整剤、群F;微生物資材【選択図】なし