A composite stretch member (10) has a plurality of fixing parts (14) for fixing an elastic member (13) and two sheet materials (11, 12), the fixing parts (14) being provided intermittently along a direction in which the elastic member (13) extends. The composite stretch member (10) has non-fixed parts (16) in which the elastic member (13) is not fixed to the two sheet materials (11, 12) between fixing parts (14) adjacent to each other along the direction in which the elastic member (13) extends. The composite stretch member (10) has folds (15) extending in the direction orthogonal to the direction in which the elastic member (13) extends. In a state in which the composite stretch member (10) is elongated 25% from the relaxed state thereof, the difference between the elongation rate of the composite stretch member and the elongation rate of the fixed parts, and the difference between the elongation rate of the composite stretch member and the elongation rate of the non-fixed parts are each within ±15%.本發明之複合伸縮構件(10)沿著彈性構件(13)所延伸之方向間斷性地具有複數個將彈性構件(13)與2片片材(11，12)固定之固定部(14)。複合伸縮構件(10)於沿著彈性構件(13)所延伸之方向相鄰之固定部(14)之間具有未將彈性構件(13)與2片片材(11，12)固定之非固定部(16)。複合伸縮構件(10)具有沿著與彈性構件(13)所延伸之方向交叉之方向延伸之褶皺(15)。於使複合伸縮構件(10)自其鬆弛狀態伸長25%之狀態下，該複合伸縮構件之伸長率與上述固定部之伸長率之差量及與上述非固定部之伸長率之差量分別為±15%以內。
