Patent ID: 7887523

Claim:
A disposable diaper having an openable section for facilitating urination, the disposable diaper comprising: a chassis defining at least a front body, a rear body and a crotch part located between the front body and the rear body; a liquid permeable top sheet and a liquid impermeable back sheet on opposite sides and covering at least part of the chassis; a liquid retentive absorber disposed between the top sheet and the back sheet and extending from the front body through the crotch part to the rear body of the chassis; and wherein the front body of the chassis has the openable section including a tearable line that extends in a width direction of the disposable diaper; a pair of reinforcing sheets disposed at both ends of the openable section, respectively, wherein the openable section is pre-cut in each of the reinforcing sheets which overlap the tearable line; an elastic auxiliary sheet covering the openable section and located on a skin-contactable side when the disposable diaper is worn by a wearer, wherein the auxiliary sheet includes (i) a pair of base sheets extending across an entire width of the front body, and (ii) a plurality of elastic members, said auxiliary sheet being formed by sandwiching the elastic members between said base sheet and fixing the elastic members to each of the base sheets with adhesive, and by releasing a tension of the elastic members after the fixing, and the auxiliary sheet further has a connecting part where the auxiliary sheet is connected to the chassis, said connecting part extending in the width direction without covering the openable section wherein said openable section, when torn, defines an opening and said elastic auxiliary sheet renders the opening widenable in response to an external force applied to the chassis around the opening and returns the opening to an initial form upon removal of the external force.