This creation provides a kind of mosquito expelling device, the mosquito expelling device includes a first noumenon and one second ontology, second ontology is equipped with the expelling parasite structure and an inductor of a capable of emitting expelling parasite sound wave, the inductor and the expelling parasite structure are electrically connected, which can sense the relative position with the first noumenon and open or close with driving the expelling parasite structure selectivity. Thereby in actual use, the first noumenon can be installed to the window frame of what window, the forms of second ontology installing what window, when person to be used opens forms movement, through the relative position of induction pieces sensing and the first noumenon, induction pieces can drive expelling parasite structure to open and issue expelling parasite sound wave automatically, thus can form one of protective action, interior is invaded to avoid mosquito, and then can more effectively reach mosquito proof effect person.本創作提供一種驅除蚊蟲裝置，該驅除蚊蟲裝置包含一第一本體及一第二本體，該第二本體設有一可發出驅蟲聲波之驅蟲結構及一感應器，該感應器與該驅蟲結構電性連接，該感應器可感測與第一本體之相對位置並驅使該驅蟲結構選擇性地開啟或關閉。藉此在實際使用時，可將第一本體裝設於窗戶之窗框，第二本體裝設於窗戶之窗體，待使用者將窗體移動開啟時，透過感應件感測與第一本體之相對位置，感應件即會自動驅使驅蟲結構開啟而發出驅蟲聲波，因而能形成一道防護作用，以避免蚊蟲侵入室內，進而能更有效地達到防蚊蟲效果者。
