A diaper main body (20) is provided with respect to a first belt (20) and a second belt (27) which are arranged to face each other across a conveyance path (R 1) and are arranged to be separated from each other as going toward the downstream side of the conveyance path 2) are adsorbed by the front and rear portions, respectively. Here, only the range other than the non-adsorption range (E1) from the crease (2A) in the diaper main body 2 to a predetermined position in the longitudinal direction is adsorbed to the first belt (20). In this state, by moving each of the belts (20, 27), while conveying the disposable diaper (1) so that the fold (2A) faces the downstream side, the non-suction range (E1) ) To separate the front part and the rear part of the diaper main body (2) from each other. Then, the side panels (3, 4) are folded in between the front portion and the rear portion of the diaper main body (2) which are separated from each other.搬送経路(R1)を挟んで互いに対向するとともに搬送経路(R1)の下流側に向かうに従い互いに離間するように配置された第1ベルト(20)及び第2ベルト(27)に対しておむつ本体(2)の前部及び後部をそれぞれ吸着させる。ここで、第1ベルト(20)に対しておむつ本体2における折り目(2A)から長手方向の所定の位置までの非吸着範囲(E1)以外の範囲のみを吸着させる。この状態で、各ベルト(20、27)を移動させることにより、折り目(2A)が下流側に向くように前記使い捨ておむつ(1)を搬送しつつ非吸着範囲(E1)を第1ベルト(20)から離しながらおむつ本体(2)の前部と後部とを離間させる。そして、互いに離間したおむつ本体(2)の前部と後部との間に各サイドパネル(3、4)を折り込む。
