To obtain a wide stretching range in a waist stretching sheet.The above problem is solved by a tape-type disposable diaper including a main body 10 including a waist stretching sheet 90 and a fastening tape 13 on a dorsal side portion B. The main body 10 has a folded-back portion 80 in which a side including a portion having a non-stretchable region 96 of the waist stretching sheet 90 is folded back to a center side and fixed.