To provide a three-dimensional hollow structural fabric for a securing a void part with a fixed thickness between an upper and a lower layers, even in the case of a structural material treated with a resin.

Warps 5 of an upper layer 3 and a lower layer 9 are used as closing yarns. When a plurality of upper wefts 7 at the upper layer side are woven, the upper wefts fly out from between the upper wefts 7, introduced from between lower wefts 11 at a facing lower layer side inclining in the folding direction to weave a plurality of the lower wefts 11 so that the wefts 7 and 11 at the upper layer-and the lower layer-sides are alternately woven. In the section view, the closing yarns 5 become upright while slightly bending between the upper and the lower two layers at the flying and the entering parts of the layer side part and form a rigid yarn structural body 23 inclined in an approximately straight line state at the intermediate part.