PURPOSE: To prepare the subject structure having excellent isotropy and an arbitrary thickness by constituting warps for element webs forming respective layers into two groups crossing at an arbitrary angle for each element web and holding wefts, the warps and vertical fibers.

CONSTITUTION: Warps x are crossed at an arbitrary angle for each element web w1, w2...wn, and vertical fibers z, z... are inserted into the webs on the sides of wefts y, y... so as to cross with the picked wefts y and the warps x, thereby permitting to sef the directions of the warps at random directions and to provide a tri-dimensional nuiltiaxially woven fabric structure w having an arbitrary thickness and scarcely causing the interlaminar delamination of the web, etc., by increasing the number of the laminated element webs.