Water absorbent sheet comprising a structure comprising at least one absorbent layer containing a water absorbent resin, sandwiched between two or more sheets of a hydrophilic nonwoven textile material, in which a central region (W1) along a longitudinal direction of a water-absorbent sheet (1) is subjected to: one or more continuous wavy reliefs (2) that do not overlap each other, extending along the longitudinal direction, and a linear relief (4) in a direction from each of the tips (3) of wavy shapes formed by the wavy relief (2) towards an edge part that surrounds along the longitudinal direction of the water absorbing sheet (1), and in the that a branched structure formed by the wavy relief (2) and the linear relief (4) has an approximately Y-shape, and in which the edge part that surrounds along the longitudinal direction of the absorbent sheet (1) of water includes regal nes (W2, W2 ') without relief not provided with relief that extend along the longitudinal direction, and also in which a percentage of relief area provided in the water-absorbent sheet (1) is from 3 up to 25% of the entire area of the water absorbent sheet (1).Lámina absorbente de agua que comprende una estructura que comprende al menos una capa absorbente que contiene una resina absorbente de agua, intercalada entre dos o más láminas de un material textil no tejido hidrófilo, en la que una región (W1) central a lo largo de una dirección longitudinal de una lámina (1) absorbente de agua se somete a: uno o más relieves (2) ondulados continuos que no se solapan entre sí, que se extienden a lo largo de la dirección longitudinal, y un relieve (4) lineal en una dirección desde cada una de las puntas (3) de formas onduladas formadas por el relieve (2) ondulado hacia una parte de borde que rodea a lo largo de la dirección longitudinal de la lámina (1) absorbente de agua, y en la que una estructura ramificada formada por el relieve (2) ondulado y el relieve (4) lineal tiene una forma aproximadamente
