There is provided a manufacturing method for a composite sheet associated with an absorbent article, in which a continuous body of an elastic member is in a stretched state and is bonded with a continuous body of a sheet. The method includes: conveying the continuous body of the sheet continuously in a conveying direction and and bonding the continuous body of the elastic member with the continuous body of the sheet while a position on the continuous body of the sheet at which the continuous body of the elastic member bonds with the continuous body of the sheet is changing continuously in the intersecting direction by transporting the continuous body of the elastic member towards the continuous body of the sheet with a guiding member, the guiding member moving back and forth in an intersecting direction that intersects the conveying direction, the continuous body of the sheet being traveling in the conveying direction. The guiding member includes a drive roller that, while being contact with the continuous body of the elastic member, is driven and rotated along a transporting direction of the continuous body of the elastic member. By changing a rotation speed of the drive roller, a stretching ratio of the continuous body of the elastic member is adjusted.
