A disposable diaper 1 includes a topsheet 2, a backsheet 3, and an absorbent member 4 between the sheets 2 and 3. A pair of leg flaps 5 each having an elastic member is provided along the laterally opposite side edges of the absorbent member 4. Each of the leg flaps 5 is fixed at its front end portion 52 and rear end portion 53 to a portion C, one of longitudinally opposite end portions of the diaper, and to a portion B, the other end portion, in such a configuration that each of the leg flaps 5 may be folded back over the side of the backsheet 3 when the disposable diaper 1 is in a flat-out state with the elastic members stretched.本發明之拋棄式尿布1係包含表面片體2、背面片體3及介在兩片體之間之吸收體4,且沿著吸收體4之長向之兩側部設有具彈性構件之一對腿箍部5、5,該一對腿箍部5、5為在拉伸前述彈性構件而展開拋棄式尿布1之狀態下,分別向背面片體3側翻折,而將該腿箍部5之前後端52、53固定於拋棄式尿布1之長向之一側部位C及另一側部位B。1...拋棄式尿布5...腿箍部6...立體皺褶部7...寬方向伸縮部12...腰伸縮部13...黏扣帶16...吸收性本體
