To make it possible to capture pollutant such as dust, pollen, exhaust gases and the like suspended in the outdoor air.

This screen comprises a sash 3 and an air filter layer 4 tensioned in an opening of the sash 3. The air filter layer 4 comprises first, second, third and fourth electrostatic member layers 5, 6, 7 and 8 alternately provided in layers consisting of a polypropylene fiber woven body which is electrically charged positively and a polypropylene fiber woven body which is charged negatively when air passes though, and a filter 9 having air permeability is interposed between the second and third electrostatic member layers 6, 7.