This invention provides a pest controlling agent composition, which is effective to control pest that is difficult to control only by one active ingredient. The pest controlling agent for agri-horticulture of the invention comprises a compound (I) represented by the following formula [I]: or salt thereof, and one or more than two compounds selected from agri-horticultural agents other than compound (I).本發明是提供農園藝用有害生物防除劑組成物，其係對由單獨的有效成分處理防除困難的有害生物，可以有效率的防除。本發明的農園藝用有害生物防除劑含有下述式[I]代表的化合物(I)或其鹽：及化合物(I)以外的農園藝用藥劑中選出的1種或2種以上的化合物。
