To provide a securing structure of fastening tapes without front target tape in a front body part and a tape type disposable diaper easily followable the change of a waist size due to the movement, time of empty stomach or time of full stomach of a wearer.

The fastening tapes 10 have male side plane fasteners 16 and female side plane fasteners 17 in the surface of the back sheet 2 side, the loop-shape securing selections can be formed by bonding the plane fasteners each other, a plurality of tape threading holes 11 constituted by longitudinally arranging expandable elongated members and bonding upper ends and the lower ends to the outside surface of the outside surface of the diaper are arranged in the outside surface of the front body part of the disposable diaper 1, the fastening tapes are secured by threading the distal end sides of the fastening tapes 10 through the tape threading holes 11 and then folding back the front end sides and bonding the plane fasteners 16, 17 each other when wearing the diaper.