A method for manufacturing a sheet-like member associated with an absorbent article by using a continuous sheet, the method comprising: a supplying step of transferring and supplying the continuous sheet to a processing section (L3aK) by transporting the continuous sheet in a direction of transport that conforms to a continuous direction in which the continuous sheet continues; a processing step of performing processing onto portions of the continuous sheet at intervals in the direction of transport, at a processing position (P3a) in the direction of transport, using a processing device in the processing section (L3aK), the portions each corresponding to the absorbent article; a position adjusting step of adjusting, in a CD direction, a position of an end portion in the CD direction in the continuous sheet, the CD direction intersecting the direction of transport in the continuous sheet, the position adjusting step being performed, by a position adjustment device, at an adjustment processing position in the direction of transport; and a detecting step of detecting a trace of the processing left on the continuous sheet, at a detection processing position downstream in the direction of transport from the processing position (P3a) and the adjustment processing position, and outputting a detection result, the supplying step including adjusting, based on the detection result, a tension in the direction of transport of the continuous sheet at a time of being transferred to the processing section (L3aK), at a position upstream in the direction of transport from the processing position (P3a), wherein the adjustment processing position is located downstream in the direction of transport from the processing position (P3a). a supplying step of transferring and supplying the continuous sheet to a processing section (L3aK) by transporting the continuous sheet in a direction of transport that conforms to a continuous direction in which the continuous sheet continues; a processing step of performing processing onto portions of the continuous sheet at intervals in the direction of transport, at a processing position (P3a) in the direction of transport, using a processing device in the processing section (L3aK), the portions each corresponding to the absorbent article; a position adjusting step of adjusting, in a CD direction, a position of an end portion in the CD direction in the continuous sheet, the CD direction intersecting the direction of transport in the continuous sheet, the position adjusting step being performed, by a position adjustment device, at an adjustment processing position in the direction of transport; and a detecting step of detecting a trace of the processing left on the continuous sheet, at a detection processing position downstream in the direction of transport from the processing position (P3a) and the adjustment processing position, and outputting a detection result, the supplying step including adjusting, based on the detection result, a tension in the direction of transport of the continuous sheet at a time of being transferred to the processing section (L3aK), at a position upstream in the direction of transport from the processing position (P3a),