Joint holes are prevented from being excessively closed to lower air permeability.An elastic sheet stretchable structure in which a first sheet layer and a second sheet layer are bonded through joint holes 31 penetrating an elastic film 30 at a plurality of sheet joined portions arranged at intervals is included, joined portion groups 40 and 40 in the stretchable region are in a relationship of intersecting a stretchable direction line ED at respective positions in an orthogonal direction LD or in a relationship of not intersecting the stretchable direction line ED at a separation width of 0.5 mm or less in the orthogonal direction LD of the stretchable direction line ED, and the joined portion groups 40 and 40 are in a relationship of not intersecting an oblique line at a predetermined separation width H in the orthogonal direction in an oblique line group of oblique lines q in the orthogonal direction intersecting the stretchable direction line ED within an angle range γ of 45 degrees or less.
