A disposable diaper (10) has: a pair of fastening tapes (90) and a liquid impermeable back sheet (60a) which is disposed on the surface of an absorption body which does not come into contact with the skin. The disposable diaper has: a back sheet arrangement region (R1) in which the back sheet (60a) is disposed and a region (R2) in which the back sheet (60a) is not disposed. The region (R2) in which the back sheet (60a) is not disposed is disposed at the front end section (10F) of the disposable diaper (10) and/or the rear end section (10R) of the disposable diaper. The rate of elongation of the region (R2) in which the back sheet (60a) is not disposed is higher than that of the back sheet arrangement region (R1). As a result of this configuration, the disposable diaper, which of tape type, is capable of appropriately covering the waist of the wearer in a manner corresponding to a change in the dimension of the waist of the wearer.
