Abstract: Improved retractable mosquito net, of the type designed to be fitted to the structure of a window opening or door, there being a fly mesh or cloth (11) which slides sideways upon two profiles (15) and (15′) optionally provided with hidden locks (10) and (10′) the fly cloth has in its lower part a profile (12) provided with a central channel (13) in which a handle (14) is attached and slides provided with, side plugs (16) and (16′), the lower part of the profile a dust excluder (13′).