Provided are disposable pant-type underwear, and a manufacturing method therefor, the disposable pant-type underwear being easy to wear, having a good fit to the body of the wearer, and requiring little material for production. The method for manufacturing disposable pant-type underwear (10) is characterized by comprising: a step for forming a layered body (100A) in which elastic bodies (103) are bonded between a webbed inner-surface sheet (101) and an outer-surface sheet (102); a step for cutting the layered body (100A) along a cutting guidance line (C) along which crotch-side edges (11a, 12a) shared by a ventral member (11) and a dorsal member (12) are periodically continuous in the web flow direction; a step for positioning, in each period, a crotch member (13) so as to span the central portion of both the ventral member (11) and the dorsal member (12) and bonding the crotch member thereto; and a step for folding a continuous body (100B) in which the crotch members (13) have been bonded, and, for each individual period, bonding the continuous body (100B) at both ends (16, 16) that are perpendicular to the direction in which the web flows, and cutting along both ends (16, 16). The method is further characterized by the cutting guidance line (C) for each period including: two end lines (11b, 11b, 12b, 12b) that are parallel to the direction in which the web flows; a pair of inclined lines (11c, 11c, 12c, 12c) that are inclined towards the ventral member (11) from the two end lines toward the center; and central lines (11d, 12d) that connect both inclined lines.