A method for producing a disposable worn article including a pair of around-torso members covering a torso of a wearer and extending in a girth direction and an absorbent body covering a crotch of the wearer, the method comprising the steps of: applying an adhesive on an elastic member extending in a carrying direction; sandwiching the elastic member between two sheets of continuous non-woven fabric having a pair of side edge portions extending in the carrying direction, and bonding together the two sheets of continuous non-woven fabric along a part of a middle portion between the pair of side edge portions via the adhesive applied on the elastic member so that the two sheets of continuous non-woven fabric are laid on each other, thereby producing a continuous member; and thermally welding together the two sheets of continuous non-woven fabric along the pair of side edge portions, which are closer to edges of the continuous member than the middle portion bonded by the adhesive, the step of producing the continuous member is performed while the two sheets of continuous non-woven fabric are unbonded together along a central region without the adhesive therebetween, wherein the central region extends in the carrying direction and divides the middle portion in two in a width direction perpendicular to the carrying direction; the thermally welding step is performed while the two sheets of continuous non-woven fabric are thermally welded together also along the central region as well as along the pair of side edge portions; and the method further comprises a step of cutting and dividing the continuous member having the pair of thermally welded side edge portions while being carried in the carrying direction along a virtual cutting line extending in the carrying direction in the central region into a first divided non-woven fabric and a second divided non-woven fabric, the first divided non-woven fabric forming one around-torso member and the second divided non-woven fabric forming the other around-torso member. applying an adhesive on an elastic member extending in a carrying direction; sandwiching the elastic member between two sheets of continuous non-woven fabric having a pair of side edge portions extending in the carrying direction, and bonding together the two sheets of continuous non-woven fabric along a part of a middle portion between the pair of side edge portions via the adhesive applied on the elastic member so that the two sheets of continuous non-woven fabric are laid on each other, thereby producing a continuous member; and thermally welding together the two sheets of continuous non-woven fabric along the pair of side edge portions, which are closer to edges of the continuous member than the middle portion bonded by the adhesive, the step of producing the continuous member is performed while the two sheets of continuous non-woven fabric are unbonded together along a central region without the adhesive therebetween, wherein the central region extends in the carrying direction and divides the middle portion in two in a width direction perpendicular to the carrying direction; the thermally welding step is performed while the two sheets of continuous non-woven fabric are thermally welded together also along the central region as well as along the pair of side edge portions; and the method further comprises a step of cutting and dividing the continuous member having the pair of thermally welded side edge portions while being carried in the carrying direction along a virtual cutting line extending in the carrying direction in the central region into a first divided non-woven fabric and a second divided non-woven fabric, the first divided non-woven fabric forming one around-torso member and the second divided non-woven fabric forming the other around-torso member.