A method for manufacturing an absorbent article comprising: manufacturing a first-specification absorbent article while transporting a material along a transporting route that corresponds to the material; and switching from manufacturing of the first-specification absorbent article to manufacturing of a second-specification absorbent article by changing a plurality of types of manufacturing conditions at different positions in the transporting route while the transporting of the material is maintained, the plurality of types of manufacturing conditions including: a first manufacturing condition that is changed at a first position in the transporting route; and a second manufacturing condition that is changed at a second position that is downstream of the first position, the switching including setting timings for changing the manufacturing conditions so that a timing for changing the second manufacturing condition is later than a timing for changing the first manufacturing condition, wherein while the absorbent article is manufactured, a sheet-shaped material is fed and transported as the material, from a material coil on which the sheet-shaped material is wound, at least one of a width, a thickness, and a basis weight of the sheet-shaped material is changed in the switching as a manufacturing condition, and depending on a magnitude of change in the at least one of the width, the thickness, and the basis weight, it is determined whether or not a tension condition of the sheet-shaped material is to be changed in the switching as a manufacturing condition. manufacturing a first-specification absorbent article while transporting a material along a transporting route that corresponds to the material; and switching from manufacturing of the first-specification absorbent article to manufacturing of a second-specification absorbent article by changing a plurality of types of manufacturing conditions at different positions in the transporting route while the transporting of the material is maintained, the plurality of types of manufacturing conditions including: a first manufacturing condition that is changed at a first position in the transporting route; and a second manufacturing condition that is changed at a second position that is downstream of the first position, the switching including setting timings for changing the manufacturing conditions so that a timing for changing the second manufacturing condition is later than a timing for changing the first manufacturing condition, wherein the plurality of types of manufacturing conditions including: a first manufacturing condition that is changed at a first position in the transporting route; and a second manufacturing condition that is changed at a second position that is downstream of the first position, a first manufacturing condition that is changed at a first position in the transporting route; and a second manufacturing condition that is changed at a second position that is downstream of the first position, the switching including setting timings for changing the manufacturing conditions so that a timing for changing the second manufacturing condition is later than a timing for changing the first manufacturing condition, wherein while the absorbent article is manufactured, a sheet-shaped material is fed and transported as the material, from a material coil on which the sheet-shaped material is wound, at least one of a width, a thickness, and a basis weight of the sheet-shaped material is changed in the switching as a manufacturing condition, and depending on a magnitude of change in the at least one of the width, the thickness, and the basis weight, it is determined whether or not a tension condition of the sheet-shaped material is to be changed in the switching as a manufacturing condition. a sheet-shaped material is fed and transported as the material, from a material coil on which the sheet-shaped material is wound, at least one of a width, a thickness, and a basis weight of the sheet-shaped material is changed in the switching as a manufacturing condition, and depending on a magnitude of change in the at least one of the width, the thickness, and the basis weight, it is determined whether or not a tension condition of the sheet-shaped material is to be changed in the switching as a manufacturing condition.