An object of the present invention is to provide a pants-type absorbent article which is improved in fit on the abdomen side of an absorbent core member. A means for solving the problem is a pants-type absorbent article (1) having an absorbent core (11), an absorbent body (10) bent toward the front and rear at a lower end portion, and a front side belt portion ( 23), which has a front side expansion and contraction region (23s) that expands and contracts in the left-right direction, and is characterized in that the absorbent core member (11) has a front side portion (10F) which is a portion bent toward the front side in the front-rear direction, and an absorbent core The material (11) is a front side portion (10F) having a lower side from the upper side in the up-and-down direction and inclined toward the center side from the outer side in the left-right direction, and the base weight is lower than the surrounding area by one pair of inclined low basis weight regions (31). ), the entire pair of inclined low basis weight regions (31) are overlapped with the front side expansion and contraction region (23s).本發明的課題係在於提供在吸收性芯材的腹部側使貼身性提升之短褲型吸收性物品。用以解決課題之手段為，一種短褲型吸收性物品(1)，係具有：具備吸收性芯材(11)，在下端部朝前後折彎之吸收性本體(10)；及前側皮帶部(23)，其具有朝左右方向伸縮的前側伸縮區域(23s)，其特徵為，吸收性芯材(11)係具有朝前後方向的前側折彎之部分亦即前側部(10F)，吸收性芯材(11)係在前側部(10F)，具有從上下方向的上側朝下側且從左右方向的外側朝中心側傾斜，並且基重較周圍的區域低之一對傾斜低基重區域(31)，一對傾斜低基重區域(31)全體是與前側伸縮區域(23s)重複。
