A mask comprises a cover body and a plastic film. The cover body is provided with a first fiber outer layer, an electrostatic fiber layer and a second fiber outer layer, in which the first fiber outer layer is overlappingly combined to an upper part of the electrostatic fiber layer, and the second fiber outer layer is overlappingly combined to a lower part of the electrostatic fiber layer. The plastic film is movably embedded between the first fiber outer layer and the electrostatic fiber layer. By utilizing friction which can be formed when taking out the plastic film or when rubbing the disclosed mask by hand to make the disclosed mask generate electrostatic adsorption force, the disclosed mask is allowed to adsorb fine particles or dust. Thus, the filtering capability of the disclosed mask can be enhanced.一種口罩,其包含一罩本體,該罩本體設有一第一纖維外層、一靜電纖維層和一第二纖維外層,該第一纖維外層相疊結合於該靜電纖維層之上方,該第二纖維外層相疊結合於該靜電纖維層之下方;一膠膜,該膠膜可活動嵌合於該第一纖維外層和該靜電纖維層之間。可利用膠膜取出而摩擦或手部搓揉口罩而摩擦讓口罩產生靜電吸附力,可讓口罩吸附細微顆粒或粉塵,俾可使本發明產生其提升口罩的過濾能力。1‧‧‧罩本體11‧‧‧第一纖維外層12‧‧‧靜電纖維層14‧‧‧第二纖維外層2‧‧‧膠膜