The purpose of the present invention is to allow excreted urine to be quickly absorbed into an absorbent material without lateral leakage even if an absorbent article is laterally displaced while being worn, by controlling the direction of flow of the urine so that the urine flows down into a recessed groove, and by increasing the retaining capacity of the recessed groove. The absorbent article has at least one recessed groove (22) into which urine flows and which is formed on the side facing the skin so as to extend in the longitudinal direction. The cross-sectional shape of the recessed groove (22) is formed so as to satisfy the following conditions: (1) the relationship between the bottom surface portion depth h of the recessed groove and the distance S between the bottom edge G of the recessed groove and the upper edge K from which the indentation of the recessed groove begins is represented by 1.5h < S (2) the relationship between the bottom surface width b of the recessed groove and the width B of a liquid collection area, the width B extending over the recessed groove and being represented by the distance between both upper edges K and K, is represented by B ≥ 3b and (3) the relationship between the area a of the recessed groove as assumed to be a rectangular groove, represented by the product of the bottom surface width b and the bottom surface portion depth h of the recessed groove, and the area A of a cross-section of the recessed groove is represented by A ≥ 2a.Linvention concerne labsorpsion rapide de lurine excrétée dans un matériau absorbant sans fuite latérale même si ce dernier est déplacé latéralement pendant quil est porté, par commande du sens découlement de lurine de telle sorte que cette dernière sécoule vers le bas dans une rainure creuse, et par augmentation de la capacité de retenue de la rainure creuse. Larticle absorbant comprend au moins une rainure creuse (22) dans laquelle lurine sécoule, et qui est formée sur le côté tourné vers la peau
