This disposable diaper (10) has a waistline retention portion extending along the width direction of the product and holding the disposable diaper on the wearer's body, and comprising a front waistline area (20), a rear waistline area (30) and fastening tape (90). Further, this disposable diaper (10) has a leg gather (75) and a stretchable crotch portion (200a) which is formed in the crotch area (25) and is capable of stretching in the longitudinal direction L of the product. The leg gather (75) is longer than the stretchable crotch portion (200a) in the product length direction L and is disposed further outwards in the product width direction W than the stretchable crotch portion (200a). A low-stretchability region (300) which is less stretchable than the stretchable crotch portion (200a) is formed between the leg gather (75) and the stretchable crotch portion (200a).
