To reduce production cost of a fibrous structure such as a synthetic fiber rope or belt while ensuring abrasion and weather resistances and functions at unvaried high levels.

The fibrous structure is composed of a plurality of strands composed of synthetic fibers. The surfaces of the synthetic fibers constituting the outermost layer of the strands are coated with a silane coating agent. Furthermore, the silane coating agent is cured or hardened by actions of a catalyst.