A disposable wearable article, comprising: a crotch portion; and side flaps without an absorber provided on both side portions of the crotch portion, the side flaps having a side stretchable region (SG) in which one or a plurality of elongated side elastic members spaced from each other is provided along a front-back direction (LD) of the disposable wearable article, wherein each side flap has a hollow portion continuing in the front-back direction (LD) along an outside edge of the side flap , each side flap has a double folded-back sheet layer folded back at the outside edge of the side flap , of which a most front surface side sheet layer and a most back surface side sheet layer in the side flap are a front surface side portion and a back surface side portion, respectively, with the folding position of the folded-back sheet layer forming a boundary located at the outside edge, each side elastic member is fixed between a front surface side part of the outer layer of the double folded-back sheet layer and a front surface side part of the inner layer of the double folded-back sheet layer, and located at a position farther toward the center of the disposable wearable article in a width direction (WD) than the folding position, all of the sheet layers adjacent to each other in the thickness direction are not bonded between the outermost side elastic member and the outside edge of the side flap , thereby forming a hollow portion between each of the sheet layers, and a part of the side flap including the hollow portion contracts in the front-back direction (LD) due to contraction of the one or more side elastic members to form a side gather. a crotch portion; and side flaps without an absorber provided on both side portions of the crotch portion, the side flaps having a side stretchable region (SG) in which one or a plurality of elongated side elastic members spaced from each other is provided along a front-back direction (LD) of the disposable wearable article, wherein each side flap has a hollow portion continuing in the front-back direction (LD) along an outside edge of the side flap , each side flap has a double folded-back sheet layer folded back at the outside edge of the side flap , of which a most front surface side sheet layer and a most back surface side sheet layer in the side flap are a front surface side portion and a back surface side portion, respectively, with the folding position of the folded-back sheet layer forming a boundary located at the outside edge, each side elastic member is fixed between a front surface side part of the outer layer of the double folded-back sheet layer and a front surface side part of the inner layer of the double folded-back sheet layer, and located at a position farther toward the center of the disposable wearable article in a width direction (WD) than the folding position, all of the sheet layers adjacent to each other in the thickness direction are not bonded between the outermost side elastic member and the outside edge of the side flap , thereby forming a hollow portion between each of the sheet layers, and a part of the side flap including the hollow portion contracts in the front-back direction (LD) due to contraction of the one or more side elastic members to form a side gather. <EOS>