There is provided a mite repellent having a high mite repellent effect and excellent formability. Further, there is provided a mite repellent product obtained by using the mite repellent and various resins in which the product is a fiber, sheet, or molded product exhibiting excellent mite repellency. The mite repellent of the present invention comprises a chemical supported on an inorganic porous substance, in which the chemical is aliphatic dibasic acid dialkyl ester having a specific structure, the inorganic porous substance has a BET specific surface area of from 550 to 1000 m2/g and a pore size of from 0.8 to 15 nm, and a supported amount of the chemical is from 0.007 to 0.09 ml with respect to 100 m2 of the BET specific surface area of the inorganic porous substance.本發明提供一種蟎蜱忌避效果高、成形性亦優異的蟎蜱忌避劑。並且提供一種纖維、薄片、成形品等蟎蜱忌避性加工品，其為使用此蟎蜱忌避劑與各種樹脂而得到的加工品，展現優良的蟎蜱忌避性。本發明之蟎蜱忌避劑為使藥劑擔載於無機多孔性物質而成之蟎蜱忌避劑，其特徵在於：前述藥劑為具有特定構造的脂肪族二元酸二烷酯，前述無機多孔性物質之BET比表面積為550~1000m2/g且細孔徑為0.8~15nm，前述藥劑的擔載量為每100m2的無機多孔性物質的BET比表面積0.007~0.09ml。
