PURPOSE: To obtain a laminated nonwoven structure having a high tensile strength and peel strength and excellent dimensional stability, flexibility, water absorption properties and wear resistance by laminating filament nonwoven fabric of thermoplastic aliphatic polyamide base to natural fiber nonwoven fabric and integrating.

CONSTITUTION: Filament nonwoven fabric of thermoplastic aliphatic polyamide- base polymer such as nylon 6 having ≥dl and ≤8dLl single yarn fineness is laminated to nonwoven fabric obtained by interlacing natural fiber web such as cotton. Then the laminate is fused and integrated treated by an ultrasonic fusing device equipped with a pattern roll in such a way that the cotton fibers positioned at least in a boundary zone of both the nonwoven fabric layers in a region in which the nylon 6 filament and the cotton fibers are fused in a dotted state are embedded and fixed in the molten part of the nylon 6 satisfying both equations of 2≤A≤40 and 7≤B≤80 in which A is the ratio (%) of the area of the total fused region to the whole surface area of a nonwoven structure and B is the density (dots/cm2) of the fused region in a dotted state to form the laminated nonwoven structure.