A method for producing a disposable worn article of the present invention is directed to a method for producing a worn article including a core portion 2 covering the crotch of the wearer, and a torso portion 3 that fits to the torso of the wearer, wherein the torso portion 3 includes a back portion 3L and a front portion 3S. The method includes: a step of carrying a first web W1 including a waist portion 31 of a first back portion 3L1 and a second web W2 including a waist portion 31 of a second back portion 3L2 in the longitudinal direction Y of the webs; a step of forming a combined member by placing the core portion 2 so as to bridge between the first and second webs W1 and W2; and a step of cutting the combined member so as to divide the combined member into a first group G1 and a second group G2.