A pant-type disposable diaper comprises: a pants-shaped outer member having a front part, a back part, and a crotch part positioned between the front part and the back part, and having a waist opening and a pair of leg openings formed by joining the front part and the back part； and an absorbent main body disposed on an inner surface of the pants-shaped outer member at the crotch part, and comprising a top sheet, a back sheet, and an absorbent core disposed between the top sheet and the back sheet； wherein the pants-shaped outer member comprises a first sheet made of a spunbonded nonwoven fabric produced by melting a polymer composition containing polyolefin and/or polyester and a surfactant. According to the pants-type disposable diaper on the above, the pants-shaped outer member is excellent in water resistance and softness.一種內褲型可拋棄式尿片，包括：一內褲形狀外件，具有一前部、一後部以及一胯部，該胯部位於該前部與該後部之間，並具有一腰部開口以及一對腿部開口，由該前部及該後部連結而形成；以及一吸收本體，設於該內褲形狀外件在該胯部的一內表面，並包括一上片、一下片以及一吸收核心，該吸收核心設於該上片及該下片之間，其中該內褲形狀外件包括一第一片，其由紡黏不織布製成，該紡黏不織布藉由熔融了包含聚烯烴及/或聚酯與一界面活性劑的聚合物組成。根據上述的內褲型可拋棄式尿片，該內褲形狀外件具有優良的防水性及柔軟度。
