PROBLEM TO BE SOLVED: To improve static and dynamic fitting property of an abdominal part of a tape type disposable diaper.SOLUTION: When wearing the tape type disposable diaper, fastening tapes 5 are connected to a target tape 6 by bringing them from both sides of the hip to an outer surface of the abdominal part F. The target tape 6 has unfixed free parts 6F on both sides of the outer surface of the abdominal part F. The unfixed free parts 6F include a connecting part 6L of the fastening tapes 6 and an elastic extendable part 6E that elastically contracts and extends in the width direction. The elastic extendable part 6E is configured so that tensile stress in elastic deformation in the width direction is larger at a crotch side part 6C than a waist side part 6W.
