Elastic member and disposable wearing article including elastic member

An underpants-type disposable wearing article comprising:

• an integrated outer member from a front body to a back body or outer members separately provided for the front body and the back body;
• an inner member attached to an intermediate portion of the outer member in a width direction to extend to both front and back sides of a crotch portion;
• side seal portions in which both side portions of the outer member in the front body and both side portions of the outer member in the back body are bonded to each other;
• and
• a waist opening and a pair of right and left leg openings,
• wherein the outer member in at least one of the front body and the back body is an elastic member having the elastic sheet stretchable structure in which the elastic sheet is interposed between a first sheet layer and a second sheet layer and the first sheet layer and the second sheet layer are bonded through joint holes penetrating the elastic sheet or via the elastic sheet at a plurality of sheet joined portions arranged at intervals,
• wherein the first sheet layer and the second sheet layer are formed of a material having translucency and the elastic sheet is visually recognizable through the first sheet layer and the second sheet layer,
• a region having the elastic sheet stretchable structure has a stretchable region that contracts in an stretchable direction by contraction of the elastic sheet and is extensible in the stretchable direction,
• first non-joint bands linearly continuous along a first direction intersecting the stretchable direction at an acute angle are repeatedly present at intervals in a direction orthogonal to the first direction as non-joint bands in which a portion not having the sheet joined portions is continuous in an unfolded state in the stretchable region,
• a plurality of sheet joined portions and joint holes are provided at intervals between adjacent first non-joint bands in the stretchable region, and
• a unit structure including a plurality of first non-joint bands having different first widths determined as widths in the direction orthogonal to the first direction is repeatedly present in the direction orthogonal to the first direction in the stretchable region,
• over a range in the width direction corresponding to a space between the side seal portions at least in a partial range in a front-back direction so that an stretchable direction of a stretchable region thereof corresponds to the width direction.