The present invention addresses the problem of providing an elastic structure, the pleats of which extend in straight lines and which is attractive and breathes well while also feeling soft. The problem is solved by an elastic structure wherein: a first sheet material (12S) and a second sheet material (12H) are bonded by an adhesive (71), which is disposed intermittently in the expansion/contraction direction and is continuous in the direction intersecting with the expansion/contraction direction, to form sheet-bonding sections (70)； elastic expanding/contracting members (15, 16) are fixed using the adhesive (71) to the first sheet material (12S) and/or the second sheet material (12H) at positions intersecting with the sheet-bonding sections (70)； the areas of the first sheet material (12S) and the second sheet material (12H) located between the sheet-bonding sections (70) billow out in opposite directions to each other, each forming pleats (80), as a result of the first sheet material (12A) and the second sheet material (12H) contracting in conjunction with the contraction of the elastic expanding/contracting members (15, 16)； and the width (70w) of each sheet-bonding section (70) in the expansion/contraction direction is 0.5-4 mm and the interval (70d) between adjacent sheet-bonding sections (70) is 4-8 mm.La présente invention vise à procurer une structure élastique, dont les plissements s'étendent en ligne droite, et qui est attractive et qui respire bien tout en donnant également une sensation douce. A cet effet, l'invention porte sur une structure élastique, dans laquelle : un premier matériau en feuille (12S) et un second matériau en feuille (12H) sont liés par un adhésif (71), qui est disposé par intermittence dans la direction de dilatation/contraction et qui est continu dans la direction croisant la direction de dilatation/contraction, de façon à former des sections de liaison de feuilles (70) ； des éléments de dilatation/contraction élastiques (15, 16) so
