Back-side band base material piece and abdominal-side band base material to be the basis for the back-side band and the abdominal-side band are prevented from twisting. A method for manufacturing an absorbent article has a main absorbent body having an absorbent body that absorbs liquid and that can be put against a crotch when worn, a back-side band that intersects the main absorbent body at one longitudinal end portion of the main absorbent body, and that is positioned on a back side when worn, and an abdominal-side band that intersects the main absorbent body at another longitudinal end portion of the main absorbent body, and that is positioned on an abdominal side when worn, and has two protruding portions that protrude from both ends of the main absorbent body in a direction intersecting the longitudinal direction of the main absorbent body, formed to the back-side band and the abdominal-side band, respectively, the method includes joining, during transportation of a continuous back-side band base material and a continuous abdominal-side band base material in a transport direction, one longitudinal end portion of a main absorbent body base material to the back-side band base material and another longitudinal end portion of the absorbent body base material to the abdominal-side band base material, so that the longitudinal direction of the main absorbent body base material intersects the transport direction, folding the main absorbent body base material and overlapping the back-side band base material with the abdominal-side band base material, temporarily joining the overlapped back-side band base material and abdominal-side band base material at a portion where the protruding portion is formed, cutting the temporarily joined back-side band base material and abdominal-side band base material and forming a back-side band base material piece and an abdominal-side band base material piece, and transporting the back-side band base material piece, the abdominal-side
