The present invention aims to improve the tape fasteners provided on the diaper chassis so that the upper outside regions of the wearers thighs should not be irritated by the edges of the tape fasteners.A lower edge 11a of a first section 11 in each tape fastener 10 extends so that a space S is defined between this lower edge 11a and an imaginary extension of a lower edge 12a of a second section 12 in the tape fastener 10.