Abstract: A crotch member of a disposable under garment is joined to central portions of a symmetrical ventral member and a symmetrical dorsal member. A crotch side edge of the ventral member includes a recessed line symmetrically recessed toward a waist side edge between a center line and left and right end portions of the ventral member. The recessed line includes bottom portions each closest to the waist side edge located at a position closer to the left and right end portions than the center line. A crotch side edge of the dorsal member include a protruding line symmetrically protruding away from a waist side edge between a centerline and left and right end portions of the dorsal member. The protruding line includes top portions farthest away from the waist side edge located at a position closer to the centerline than the left and right end portions.

Abstract: An absorbent article that includes a stretchable region made of an elastic sheet. The elastic sheet includes a first non-stretchable sheet, an elastic film and a second non-stretchable sheet. The first non-stretchable sheet, the elastic film and the second non-stretchable sheet are laminated in this order. The elastic sheet includes joining-opening sections formed by joining the first non-stretchable sheet and the second non-stretchable sheet. The elastic film includes an opening at each of the joining-opening sections. The opening is formed while the elastic film is stretched in a stretchable direction. Each of the joining-opening sections includes the opening and a joint. The joining-opening sections include an adjacent joining-opening section that includes at least two joining-opening sections that are arranged adjacently in a direction inclined with respect to the stretchable direction.

Abstract: A crotch member of a disposable under garment is joined to central portions of a symmetrical ventral member and a symmetrical dorsal member. A crotch side edge of the ventral member includes a recessed line symmetrically recessed toward a waist side edge between a center line and left and right end portions of the ventral member. The recessed line includes bottom portions each closest to the waist side edge located at a position closer to the left and right end portions than the center line. A crotch side edge of the dorsal member include a protruding line symmetrically protruding away from a waist side edge between a centerline and left and right end portions of the dorsal member. The protruding line includes top portions farthest away from the waist side edge located at a position closer to the centerline than the left and right end portions.

Abstract: A disposable pant type undergarment includes a ventral member, a dorsal member and a crotch member that bridges the ventral member and the dorsal member. A crotch edge of the ventral member and the dorsal member each includes right and left edge lines, right and left tilted lines and a central line. The edge lines are approximately parallel in a waist-around direction. Nearer the central line, a distance between a waist opening of the undergarment and the tilted lines of the ventral member is shorter, and a distance between the waist opening and the tilted lines of the dorsal member is longer. Tilted portions of a leg-surrounding elastic body extend in a leaving direction from the crotch edge of the ventral member and extend into an area overlapped with the ventral member and the crotch member.

Abstract: A crotch member for a disposable undergarment includes: a ventral bonded portion; a dorsal bonded portion; at least one pair of crotch side edge elastic members, that extend and are bonded along to left and right side edges of the crotch member with a strip shape, and are separated from the ventral bonded portion and the dorsal bonded portion; and at least one pair of ventral connection elastic members, that are bonded to the crotch member at a position closer to the center than the crotch side edge elastic members, that overlap with the ventral bonded portion at a ventral end portion, that do not overlap with the dorsal bonded portion at a dorsal end portion, and have higher tensile force than the crotch side edge elastic members.

Abstract: A disposable undergarment includes a ventral member and a dorsal member that are bonded to each other at both bonded portions, a crotch member that is bonded to and bridges between both center portions of the ventral member and the dorsal member, a waist opening, left and right leg openings, and a first elastic member that extends upward toward an upper edge from lower portions of the bonded portions of the ventral member to a center in a waist-around direction. The disposable undergarment has a shape widening from the waist opening toward the left and the right leg opening on a lower side. The upper edge of the ventral member has a center portion disposed lower than an upper edge of the dorsal member.

Abstract: A disposable pant type undergarment includes a ventral member, a dorsal member and a crotch member that bridges the ventral member and the dorsal member. A crotch edge of the ventral member and the dorsal member each includes right and left edge lines, right and left tilted lines and a central line. The edge lines are approximately parallel in a waist-around direction. Nearer the central line, a distance between a waist opening of the undergarment and the tilted lines of the ventral member is shorter, and a distance between the waist opening and the tilted lines of the dorsal member is longer. Tilted portions of a leg-surrounding elastic body extend in a leaving direction from the crotch edge of the ventral member and extend into an area overlapped with the ventral member and the crotch member.