PROBLEM TO BE SOLVED: To provide a drug sublimating object in which a carrier containing room temperature sublimating drug is housed inside of a flat shaped drug container used by fixing the same to a screen door, which does not hinder a window or a weather door even though fixed to the screen door, and in which drug effectively sublimates and spreads over the whole screen door, and which can repel or evade the flying harmful insects such as mosquitos and black flies and a method for repelling the flying harmful insects using the same.SOLUTION: In the drug sublimating object in which the carrier containing room temperature sublimating drug is housed inside of the flat shaped drug container, the thickness of the drug container is 3 mm to 10 mm, and a gap of not less than 1 mm is arranged between the carrier and an inner face of the drug container.COPYRIGHT: (C)2012,JPO&INPIT【課題】常温揮散性薬剤を含有する担体を扁平状の薬剤容器の内部に収納した網戸に固定して用い、網戸に固定しても窓や雨戸の邪魔にならず、かつ薬剤が効率的に揮散し、網戸全体広がり、蚊、ブユ等の飛翔害虫を駆除又は忌避することが可能な薬剤揮散体及びこれを用いた飛翔害虫防除方法の提供。【解決手段】常温揮散性薬剤を含有する担体を扁平状の薬剤容器の内部に収納した薬剤揮散体であって、前記薬剤容器の厚みが3mm~10mmであり、かつ前記担体と前記薬剤容器内面との間に1mm以上の隙間を設けたことを特徴とする網戸に固定して用いる薬剤揮散体及びこれを用いた飛翔害虫防除方法。【選択図】なし