To provide a woven and knitted material for an insect proof net made of a polyester causing less deterioration due to ultraviolet light by using a sheath-core type fusing filament.

This insect proof net is formed of the sheath-core type fusing filaments having a sheath-core area ratio of 50:50 to 90:10 wherein core components comprise a polyester containing 0.3-5.0 wt.% of an organic ultraviolet light-absorbing agent based on the weight of the core components, and sheath components comprise a polyester with a low melting point, and the intersections of the woven and knitted material are bonded with heat. The organic ultraviolet light-absorbing agent preferably comprises a triazine-based compound.