A method of producing a wearing article, wherein the wearing article comprises a front abdominal portion disposed on a front abdominal region of a wearer in a worn state, a rear dorsal portion disposed on a rear dorsal region of the wearer in the worn state, and a crotch portion connecting the front abdominal portion and the rear dorsal portion together in the worn state, the method comprising: a strip conveying step of conveying a first strip for forming one of the front abdominal portion and the rear dorsal portion, and a second strip for forming the other, in such a manner as to allow respective longitudinal directions of the first and second strips (4A, 5A) to become parallel to each other, while applying, to each of the first and second strips (4A, 5A), a tension along the longitudinal direction thereof; a dividing step of dividing the first strip being conveyed, along a dividing line along a width direction of the first strip, thereby the first strip being divided in its longitudinal direction; a holding step of holding a relative positional relationship between two segments of the first strip on both sides of the dividing line; a restricting step of, within a period of implementation of the holding step, detachably attaching a first attaching-detaching member to the first strip in such a manner as to cover the dividing line formed in the dividing step, thereby restricting a relative displacement between the segments of the first strip on both sides of the dividing line; a first-end-region joining step of joining the first attaching-detaching member and a first end region of the crotch portion together; a second-end-region joining step of joining the second strip and a second end region of the crotch portion on a side opposite to the first end region; a folding step of folding an intermediate region of the crotch portion, thereby superimposing the first and second strips (4A, 5A) on each other; a side-sealing step of joining the superimposed first and second strips (4A, 5A) together on a lateral side of the folded crotch portion; and a cutting step of cutting the superimposed first and second strips (4A, 5A) in such a manner that a joined section (51, 52) formed in the side-sealing step is left on each of both sides of the folded crotch portion, wherein the holding step is started simultaneously together with or before the dividing step, and discontinued simultaneously together with or after the restricting step. a strip conveying step of conveying a first strip for forming one of the front abdominal portion and the rear dorsal portion, and a second strip for forming the other, in such a manner as to allow respective longitudinal directions of the first and second strips (4A, 5A) to become parallel to each other, while applying, to each of the first and second strips (4A, 5A), a tension along the longitudinal direction thereof; a dividing step of dividing the first strip being conveyed, along a dividing line along a width direction of the first strip, thereby the first strip being divided in its longitudinal direction; a holding step of holding a relative positional relationship between two segments of the first strip on both sides of the dividing line; a restricting step of, within a period of implementation of the holding step, detachably attaching a first attaching-detaching member to the first strip in such a manner as to cover the dividing line formed in the dividing step, thereby restricting a relative displacement between the segments of the first strip on both sides of the dividing line; a first-end-region joining step of joining the first attaching-detaching member and a first end region of the crotch portion together; a second-end-region joining step of joining the second strip and a second end region of the crotch portion on a side opposite to the first end region; a folding step of folding an intermediate region of the crotch portion, thereby superimposing the first and second strips (4A, 5A) on each other; a side-sealing step of joining the superimposed first and second strips (4A, 5A) together on a lateral side of the folded crotch portion; and a cutting step of cutting the superimposed first and second strips (4A, 5A) in such a manner that a joined section (51, 52) formed in the side-sealing step is left on each of both sides of the folded crotch portion, wherein the holding step is started simultaneously together with or before the dividing step, and discontinued simultaneously together with or after the restricting step.