PROBLEM TO BE SOLVED : To provide a pest control composition having an excellent control effect on pests such as ixodid and flea. SOLUTION : A pest control composition contains a condensed heterocyclic compound represented by formula (1), and at least one pest control active ingredient selected from the group consisting of group A : anti-parasite agents, group B : insecticides and miticides, and group C : other pharmaceutical active ingredients for animals. (R1 is H, halogen, C1-3 alkyl or the like; R5 is CF3, C2F5 or the like; R6 is C1-6 alkyl or the like; X is CH or N; Y is NH, NCH3, O or S; n is an integer of 0-2). SELECTED DRAWING : None COPYRIGHT : (C)2019, JPO&INPIT