A pull-on disposable wearing article 1 has a base sheet 2 comprising an inner sheet 6 (first sheet) and an outer sheet 5 (second sheet). A plurality of auxiliary elastic members 19 extending across a panel 25 are interposed between the inner sheet 6 and the outer sheet 5 and attached to these sheets 6, 5 between waist surrounding elastic members 15 and leg-holes 4 so that these auxiliary elastic members 19 may contract in the waist-circumferential direction. Each of the auxiliary elastic members 19 has transversely opposite end portions secured to the inner and outer sheets 6, 5 and an intermediate portion let free from the inner and outer sheets 6, 5. A ratio of a dimension of the region of the base sheet 2 to which the auxiliary elastic members 19 are laid as these auxiliary elastic members 19 have contracted to a dimension of the auxiliary elastic members 19 in a non-stretched state is in a range of 1.0 to 1.1 as measured in the waist-circumferential direction.
