To provide an insect screen for opening/closing window of an automobile, which is not installed inside nor outside of a door of the automobile.

In the insect screen 100 for opening/closing window of an automobile, front insertion section 120, a rear insertion section 130 and an upper insertion section 140 are formed so as to be inserted into a groove of a door opening/closing window. The front insertion section 120 and the rear insertion section 130 are formed in a cross sectional U shape and the upper insertion section 140 is formed in a claviform shape or the cross sectional U shape. Thereby, the insect screen 100 for opening/closing window of an automobile is framed in the groove of the opening/closing window so as not to fall off from opening/closing window frame.