A fastening tape 100 of a disposable diaper 10 has a base sheet 120 configured by a nonwoven fabric, and a hook sheet 110 in which a plurality of engagement hooks are provided. The KES flexural rigidity value of the entire fastening tape existent region SALL in which the fastening tape 100 is provided, in a longitudinal direction DL of the absorbent main body, is 11.755 gf.cm2 or less.