This diaper (1A) is provided with: an absorbent main body (2) including an absorbent (23), a surface sheet (21), and an outer-layer composite sheet (22) and an elastic side panel (3) attached to a lateral part of the absorbent main body (2). A fastening tape (4) is provided to a distal end part (3a) of the side panel (3). The absorbent main body (2) has a three-dimensional-guard forming sheet (24) at both lateral parts thereof. The three-dimensional-guard forming sheet (24) has a two-layer-structure portion (24a) and a three-layer-structure portion (24b) in which both lateral parts of a single sheet are folded back and layered over each other, and the layers are bonded together. The three-dimensional-guard forming sheet (24) is fixed at both lateral parts of the absorbent main body (2) to a sheet (31) constituting the side panel (3).本發明之尿布(1A)包括:吸收性本體(2),其包含吸收體(23)、表面片材(21)及外層複合片材(22);及伸縮性之側片(3),其係安裝於吸收性本體(2)之側部。側片(3)於其前端部(3a)設置有黏扣帶(4)。吸收性本體(2)於其兩側部包含立體防護形成用片材(24)。立體防護形成用片材(24)具有將一片片材之兩側部翻折並相互重合地積層而成之2層構造部分(24a)與3層構造部分(24b),且將該等之層間接合。立體防護形成用片材(24)係於吸收性本體(2)之兩側部固定於構成側片(3)之片材(31)。1A‧‧‧拋棄式尿布2‧‧‧吸收性本體3‧‧‧側片3a‧‧‧側片之前端部3b‧‧‧側片之基端部(吸收性本體側之端部)4‧‧‧黏扣帶21‧‧‧表面片材22‧‧‧外層複合片材22a‧‧‧防漏片材22b‧‧‧外層不織布23‧‧‧吸收體24‧‧‧立體防護形成用片材24a‧‧‧2層構造部分24b‧‧‧3層構造部分24I‧‧‧內側端部24I1‧‧‧內側端部之緣24O‧‧‧外側端部24O1‧‧‧外側端部之緣25‧‧‧立體防護形成用彈性構件31、32‧‧‧片材33‧‧‧彈性構件35‧‧‧本體側接著劑層35a‧‧‧端部36‧‧‧前端側接著劑層36b‧‧‧端部37‧‧‧中間接著劑層38‧‧‧非接著區域41‧‧‧固著部42‧‧‧帶基材61‧‧‧外層接著劑層61a‧‧‧端部62‧‧‧連接用接著劑層62a‧‧‧端部63‧‧‧補強用接著劑層63a‧‧‧端部64‧‧‧第2補強用接著劑層64b‧‧‧端部65‧‧‧第2連接用接著劑層65b‧‧‧端部66‧‧‧表面側接著劑層67、68‧‧‧接著劑層P1‧‧‧重疊之部分P2‧‧‧重疊之部分P3‧‧‧重疊之部分P4‧‧‧重疊之部分P5‧‧‧重疊之部分W1‧‧‧寬度X‧‧‧寬度方向
