The purpose of the present disclosure is to provide an absorbent article in which bodily fluid easily flows in the longitudinal direction of an absorbent core and leakage at a crotch region is suppressed. An absorbent article according to the present disclosure has the following configuration. An absorbent article (1) is characterized in that: an absorbent core (9) includes a first layer (17) and a second layer (19) that are adjacent to each other in the thickness direction (T)； the first layer (17) has, in a front-body part (FP), (i) a groove (25) extending in the longitudinal direction (L), penetrating in the thickness direction (T), and having a terminal end (27) at a rear (RD) position and (ii) a base (29) disposed adjacent to the rear (RD) position of the groove (25) with the terminal end (27) therebetween； the second layer (19) has a groove corresponding part (33) and a base corresponding part (35) at positions overlapping the groove (25) and the base (29) respectively in the thickness direction (T)； and the average density of highly absorbent polymer particles (23) contained in the base (29) and the average density of the highly absorbent polymer particles (23) contained in the base corresponding part (35) are higher than the average density of the highly absorbent polymer particles (23) contained in the groove corresponding part (33).La présente invention vise à fournir un article absorbant, dans lequel un fluide corporel s'écoule facilement dans la direction longitudinale d'un noyau absorbant et une fuite au niveau d'une région d'entrejambe est supprimée. Un article absorbant selon la présente invention a la configuration suivante. Un article absorbant (1) est caractérisé en ce que : un noyau absorbant (9) comprend une première couche (17) et une seconde couche (19) qui sont adjacentes l'une à l'autre dans la direction d'épaisseur (T) ； la première couche (17) comporte, dans une partie de corps avant (FP), (i) une rainure (25) s'étendant dans la direction l
