The present invention aims to provide method and apparatus for making a disposable diaper improved so that a region of the continuous elastic predetermined to extend across the middle of the crotch region may be attached to continuous web in a desired condition. A method for making a disposable diaper 10 includes the steps of, (A) coating a first surface 102A of a first web 102 with an adhesive 130 to define an adhesion region 131 extending from first side edge 106 toward second side edge 107 in a cross direction CD and a non-adhesion region 134 extending along the second side edge 107 in a machine direction MD (B) rocking the continuous elastic 104 by a rocker arm 113 in the cross direction CD and thereby laying the continuous elastic 104 on the first surface 102A of the first web 102 in a curved pattern such that the continuous elastic 104 may have crest-segments 104a each curving convexly toward the first side edge 106, trough-segments 104b each defined between a pair of the adjacent crest-segments 104a and curving concavely from the first side edge 106 and intermediate segments 104c connecting the crest-segments 104a to the trough-segments 104b (C) attaching the continuous elastic 104 including the trough-segments 104b and the intermediate segments 104c but except the trough-segments 104b to the first surface 102A of the first web 102 in the adhesion regions 131 by a first pressure roll 112 and (D) putting flat and bonding together the first web 102 and the second web 105 by a second pressure roll 118.
