Provided is a composition having an excellent pest control effect. This composition contains a condensed heterocyclic compound represented by the following formula (1) and a solvent selected from the following group (A).Wherein, R1 represents a hydrogen atom, a C1-3alkyl group optionally having one or more than one halogen atoms, etc.R2 represents a C1-C3alkyl group, R3and R4 are the same or different, each represents a hydrogen atom or a C1-3alkyl group.n represents 0,1 or 2.The group (A) is a group including pentanol, heptanol, octanol, cyclopentanol, butylene glycol, glycerol, tetrahydrofurfuryl alcohol, ethylene glycol monomethyl ether, tripropylene glycol monomethyl ether, propylene glycol phenyl ether, isopropyl acetate, octyl acetate, methyl laurate, methyl myristate, acetyl tributyl citrate, dimethyl succinate and linoleic acid.本發明提供一種對有害生物具有優異防治效果之組成物。一種有害生物防治組成物，其係含有式(1)所示之縮合雜環化合物、及選自下述群組(A)之1種溶劑：[式中，R1表示氫原子、可具有1個以上的鹵原子之C1至C3烷基等，R2表示C1至C3烷基，R3及R4可為相同或不同，表示氫原子或C1至C3烷基，n表示0、1或2，m表示0、1或2]。群組(A)：由戊醇、庚醇、辛醇、環戊醇、丁二醇、甘油、四氫呋喃甲醇、乙二醇單甲醚、三丙二醇單甲醚、丙二醇苯基醚、乙酸異丙酯、乙酸辛酯、月桂酸甲酯、肉豆蔻酸甲酯、乙醯檸檬酸三丁酯、琥珀酸二甲酯和亞麻油酸所成之群組。
