PURPOSE: To obtain a net grill where a gap is not enlarged when a part is rent and where is less unevenness of tension by sticking and fixing a triaxial woven net cross composed of specified woven composition front of a frame in an extended state.

CONSTITUTION: The net cross 13 which is constituted by three woven threads (a) and (b) consisting of aramide fibers or the like and in which two warps (a) combined in an X-shape are crossed to one weft (b) in a range where respective confronting angles are within 40 degrees to 80 degrees is sticked and fixed to the frame 2 in an extended state. Consequently, anisotropy is reduced, tension strength in all directions becomes equal and woven unevenness is reduced. Thus, the enlargement of the gap at the time of rending is prevented, and the unevenness of tension when the net cross 13 is put up on the frame 2 can be reduced.