A manufacturing apparatus for manufacturing an absorbent article by performing a predetermined process step on a stretchable sheet-like member associated with the absorbent article, the stretchable sheet-like member continuing along a transporting direction, the apparatus comprising: an upstream transport mechanism (CVu) that is adapted to transport the stretchable sheet-like member along the transporting direction; a downstream transport mechanism (CVd) that is located downstream in the transporting direction from the upstream transport mechanism (CVu), and that is adapted to transport the stretchable sheet-like member along the transporting direction; an extension-ratio adjustment mechanism that is located between the upstream transport mechanism (CVu) and the downstream transport mechanism (CVd), and that is adapted to adjust an extension ratio at which the stretchable sheet-like member extends in the transporting direction; and a processing apparatus that is adapted to perform the predetermined process step on the stretchable sheet-like member that is being transported by the downstream transport mechanism (CVd), wherein, the upstream transport mechanism (CVu) is configured to transport a first stretchable sheet-like member in which parts to be a first-size absorbent article are lined up at a first pitch in the transporting direction, and the extension-ratio adjustment mechanism is configured to adjust an extension ratio of the first stretchable sheet-like member so that the parts to be the first-size absorbent article are lined up at a predetermined pitch, and to transfer the first stretchable sheet-like member to the downstream transport mechanism (CVd); and wherein the upstream transport mechanism (CVu) is configured to transport a second stretchable sheet-like member in which the parts to be a second-size absorbent article are lined up at a second pitch in the transporting direction, the second pitch being different from the first pitch, and the extension-ratio adjustment mechanism is configured to adjust an extension ratio of the second stretchable sheet-like member so that the parts to be the second-size absorbent article are lined up at the predetermined pitch, and to transfer the second stretchable sheet-like member to the downstream transport mechanism (CVd). an upstream transport mechanism (CVu) that is adapted to transport the stretchable sheet-like member along the transporting direction; a downstream transport mechanism (CVd) that is located downstream in the transporting direction from the upstream transport mechanism (CVu), and that is adapted to transport the stretchable sheet-like member along the transporting direction; an extension-ratio adjustment mechanism that is located between the upstream transport mechanism (CVu) and the downstream transport mechanism (CVd), and that is adapted to adjust an extension ratio at which the stretchable sheet-like member extends in the transporting direction; and a processing apparatus that is adapted to perform the predetermined process step on the stretchable sheet-like member that is being transported by the downstream transport mechanism (CVd), wherein, the upstream transport mechanism (CVu) is configured to transport a first stretchable sheet-like member in which parts to be a first-size absorbent article are lined up at a first pitch in the transporting direction, and the extension-ratio adjustment mechanism is configured to adjust an extension ratio of the first stretchable sheet-like member so that the parts to be the first-size absorbent article are lined up at a predetermined pitch, and to transfer the first stretchable sheet-like member to the downstream transport mechanism (CVd); and wherein the upstream transport mechanism (CVu) is configured to transport a second stretchable sheet-like member in which the parts to be a second-size absorbent article are lined up at a second pitch in the transporting direction, the second pitch being different from the first pitch, and the extension-ratio adjustment mechanism is configured to adjust an extension ratio of the second stretchable sheet-like member so that the parts to be the second-size absorbent article are lined up at the predetermined pitch, and to transfer the second stretchable sheet-like member to the downstream transport mechanism (CVd).