Provided is a manufacturing method for a composite sheet capable of easily manufacturing a composite sheet comprising, in a machine direction, a section with high expandability and a section with low expandability. The manufacturing method for the composite sheet (106) includes (a) a step for fixing a continuous elastic body (103) extending in the machine direction (MD) to a first sheet (101) conveyed in the machine direction (MD), (b) a step for cutting a part of the one continuous elastic body (103) fixed to the first sheet (101) in intervals in the machine direction (MD), and (c) a step for, in a state in which the continuous elastic body (103) is interposed between the first sheet (101) and a second sheet (102), bonding the first sheet (101) and the second sheet (102) to one another.本發明提供一種複合薄片之製造方法，其係能容易地製造在機械方向具有伸縮力大的部分和伸縮力小的部分之複合薄片。複合薄片(106)之製造方法，包含：(a)將朝機械方向(MD)延伸的連續彈性體(103)固定於被朝機械方向(MD)搬運的第1薄片(101)的步驟，(b)將被固定於第1薄片(101)的一條連續彈性體(103)當中的一部分在機械方向(MD)隔著間隔切斷的步驟，以及(c)於在第1薄片(101)和第2薄片(102)之間介在有連續彈性體(103)的狀態將第1薄片(101)和第2薄片(102)彼此接合的步驟。
