A belt-shaped woven structure formed by weaving a non-heat fusible synthetic fiber and a heat fusible synthetic fiber containing in a surface portion thereof a heat fusible component having a softening point lower by 30 °C or more than that of the non-heat fusible synthetic fiber. The heat fusible synthetic fiber is used in at least a part of weft threads forming the woven structure, so that a heat treatment on the woven structure at a temperature higher than the softening point of the heat fusible component fusion bonds the heat fusible synthetic fibers to each other or the heat fusible synthetic fiber and the non-heat fusible fiber. A method of efficiently producing the belt-shaped woven structure such as a seatbelt webbing which is capable of maintaining long-lasting lateral rigidity after repeated use, less prone to twisting, flexible and easy to handle.
