An absorbent article comprising: a stretchable region, wherein the stretchable region of the absorbent article is made of an elastic sheet in which a first non-stretchable sheet (21, 31), an elastic film (23, 33) and a second non-stretchable sheet (22, 32) are laminated in this order, the elastic sheet is provided with a plurality of joining-opening sections (51 to 55, 62 to 68) that are constituted by joints (51a to 55a, 62a to 68a) and openings (51b to 55b, 62b to 68b), the joints (51a to 55a, 62a to 68a) are formed by welding the first non-stretchable sheet (21, 31) and the second non-stretchable sheet (22, 32) in a state where the elastic film (23, 33) is stretched in a stretchable direction of the stretchable region, a length of the joint (51a to 55a, 62a to 68a) in the stretchable direction is shorter than a length of the joint (51a to 55a, 62a to 68a) in a direction perpendicular to the stretchable direction, the length of the joint (51a to 55a, 62a to 68a) in the stretchable direction is 0.1 to 1.0 mm, the length of the joint (51a to 55a, 62a to 68a) in the direction perpendicular to the stretchable direction is 0.3 to 3.0 mm, the openings (51b to 55b, 62b to 68b) are formed in the elastic film (23, 33) by forming the joints (51a to 55a, 62a to 68a), some or all of the joining-opening sections (52 to 55, 62 to 68) form adjacent joining-opening sections (50A, 50B, 60A, 60B, 60C) constituted by two or three of the joining-opening sections (52 to 55, 62 to 68) which are close to each other, the distance (d1, d2, d3, d4) between the joints (52a to 55a, 62a to 68a) of the adjacent joining-opening sections (50A, 50B, 60A, 60B, 60C) in the stretchable direction is 0.3 to 1.5 mm, the openings (52b to 55b, 62b to 68b) of the adjacent joining-opening sections (50A, 50B, 60A, 60B, 60C) are ununited each other, the joining-opening sections (52 to 55, 62 to 68) in the adjacent joining-opening section (50A, 50B, 60A, 60B, 60C) are arranged adjacently in a direction inclined with respect to the stretchable direction, and the adjacent joining-opening sections (50A, 50B, 60A, 60B, 60C) are arranged such that dividing lines (G1-G5) to divide the adjacent joining-opening section(50A, 50B, 60A, 60B, 60C) into two in a direction perpendicular to the direction (H1-H3) inclined with respect to the stretchable direction are not aligned on a straight line. a stretchable region, wherein the stretchable region of the absorbent article is made of an elastic sheet in which a first non-stretchable sheet (21, 31), an elastic film (23, 33) and a second non-stretchable sheet (22, 32) are laminated in this order, the elastic sheet is provided with a plurality of joining-opening sections (51 to 55, 62 to 68) that are constituted by joints (51a to 55a, 62a to 68a) and openings (51b to 55b, 62b to 68b), the joints (51a to 55a, 62a to 68a) are formed by welding the first non-stretchable sheet (21, 31) and the second non-stretchable sheet (22, 32) in a state where the elastic film (23, 33) is stretched in a stretchable direction of the stretchable region, a length of the joint (51a to 55a, 62a to 68a) in the stretchable direction is shorter than a length of the joint (51a to 55a, 62a to 68a) in a direction perpendicular to the stretchable direction, the length of the joint (51a to 55a, 62a to 68a) in the stretchable direction is 0.1 to 1.0 mm, the length of the joint (51a to 55a, 62a to 68a) in the direction perpendicular to the stretchable direction is 0.3 to 3.0 mm, the openings (51b to 55b, 62b to 68b) are formed in the elastic film (23, 33) by forming the joints (51a to 55a, 62a to 68a), some or all of the joining-opening sections (52 to 55, 62 to 68) form adjacent joining-opening sections (50A, 50B, 60A, 60B, 60C) constituted by two or three of the joining-opening sections (52 to 55, 62 to 68) which are close to each other, the distance (d1, d2, d3, d4) between the joints (52a to 55a, 62a to 68a) of the adjacent joining-opening sections (50A, 50B, 60A, 60B, 60C) in the stretchable direction is 0.3 to 1.5 mm, the openings (52b to 55b, 62b to 68b) of the adjacent joining-opening sections (50A, 50B, 60A, 60B, 60C) are ununited each other, the joining-opening sections (52 to 55, 62 to 68) in the adjacent joining-opening section (50A, 50B, 60A, 60B, 60C) are arranged adjacently in a direction inclined with respect to the stretchable direction, and the adjacent joining-opening sections (50A, 50B, 60A, 60B, 60C) are arranged such that dividing lines (G1-G5) to divide the adjacent joining-opening section(50A, 50B, 60A, 60B, 60C) into two in a direction perpendicular to the direction (H1-H3) inclined with respect to the stretchable direction are not aligned on a straight line.