<;P>;PROBLEM TO BE SOLVED: To provide a noxious insect-controlling agent for a window screen, to be applied at the window screen, exhibiting a high noxious insect-controlling effect and also equipping an excellent foul-preventing effect. <;P>;SOLUTION: This noxious insect-controlling agent for the window screen includes (a) a noxious insect-controlling component and (b) an anti-static component, wherein preferably the noxious insect-controlling component (a) is one kind or more selected from pyrethroid-based and organosilicon-based insecticides, the anti-static component (b) is an anionic surfactant, and in addition, an anionic solubilizer and water are contained. <;P>;COPYRIGHT: (C)2009,JPO&INPIT