A method for making disposable diapers comprising the step of continuously feeding a web for forming a front sheet member and a web for forming a rear sheet member in a first machine direction, said method being characterized by further the steps of: coating said webs (9a, 9b) with hot melt adhesive by coaters; continuously feeding elastic members for a front sheet member and elastic members for a rear sheet member in parallel to each other and under tension in said first machine direction; bonding these elastic members (61, 62) to each of the webs (9a, 9b) of said front and rear sheet members (20, 30) over approximately half width of each of said webs (9a, 9b) as viewed in a direction orthogonal to the first machine direction; folding each of said webs in two, respectively, so that surfaces thereof having said elastic members for front and rear sheet member (61, 62) coated thereon define inner surfaces to form said front sheet member having a constant width dimension as measured in the direction orthogonal to said first machine direction and said rear sheet member also having a constant width dimension so that said front and rear sheet members (20, 30) continuously run with a spacing from and in parallel to each other; feeding at regular intervals an absorbent panel provided along opposite long sides with a pair of elastic members for a crotch region bonded under tension thereto and provided with an absorbent core bonded thereto so as to be symmetric about an imaginary center line bisecting a distance between said pair of elastic members for the crotch region to said front and rear sheet members (20, 30) running in the first machine direction; placing and bonding said absorbent panel on and to said front and rear sheet members (20, 30) so that said pair of elastic members for the crotch region extend orthogonally to said elastic members for the front sheet member and said elastic members for the rear sheet member; and cutting said front and rear sheet members (20, 30) having said absorbent panel bonded thereto substantially along the middle between each pair of said adjacent absorbent panels to obtain individual diapers. coating said webs (9a, 9b) with hot melt adhesive by coaters; continuously feeding elastic members for a front sheet member and elastic members for a rear sheet member in parallel to each other and under tension in said first machine direction; bonding these elastic members (61, 62) to each of the webs (9a, 9b) of said front and rear sheet members (20, 30) over approximately half width of each of said webs (9a, 9b) as viewed in a direction orthogonal to the first machine direction; folding each of said webs in two, respectively, so that surfaces thereof having said elastic members for front and rear sheet member (61, 62) coated thereon define inner surfaces to form said front sheet member having a constant width dimension as measured in the direction orthogonal to said first machine direction and said rear sheet member also having a constant width dimension so that said front and rear sheet members (20, 30) continuously run with a spacing from and in parallel to each other; feeding at regular intervals an absorbent panel provided along opposite long sides with a pair of elastic members for a crotch region bonded under tension thereto and provided with an absorbent core bonded thereto so as to be symmetric about an imaginary center line bisecting a distance between said pair of elastic members for the crotch region to said front and rear sheet members (20, 30) running in the first machine direction; placing and bonding said absorbent panel on and to said front and rear sheet members (20, 30) so that said pair of elastic members for the crotch region extend orthogonally to said elastic members for the front sheet member and said elastic members for the rear sheet member; and cutting said front and rear sheet members (20, 30) having said absorbent panel bonded thereto substantially along the middle between each pair of said adjacent absorbent panels to obtain individual diapers.