An absorbent article, such as a sanitary napkin or a diaper for urinary incontinence (1), which has longitudinal side edges (2, 3) and transverse end edges (4, 5) and comprising a top sheet (8) fluid permeable, a fluid impervious backsheet (9) and an absorbent core (10) located between said topsheet (8) and said backsheet (9), said absorbent core (10) comprising a first layer (11) absorbent having an opening (12) extending therethrough and a fluid flow control structure (13) that is located between said first absorbent layer (11) and said backsheet (9), and in wherein the first absorbent layer (11) has a longitudinal front part (6) and a longitudinal rear part (7) and a narrow transverse transition (14) is located between said front part (6) and said rear part (7), and 20-50% of the longitudinal length of the opening (12) it is located in the front part (6) of the first absorbent layer (11), and is characterized in that the width of the narrow transverse transition (14) is 50-75% of the widest transverse width of the front part (6 ) of the first absorbent layer (11).Un artículo absorbente, tal como una compresa higiénica o un pañal para la incontinencia urinaria (1), que tiene bordes (2, 3) de lado longitudinales y bordes (4, 5) de extremo transversales y que comprende una lámina superior (8) permeable a los fluidos, una lámina posterior (9) impermeable a los fluidos y un núcleo (10) absorbente que se localiza entre dicha lámina superior (8) y dicha lámina posterior (9), comprendiendo dicho núcleo (10) absorbente una primera capa (11) absorbente que tiene una abertura (12) que se extiende a su través y una estructura (13) de control de flujo de fluido que se localiza entre dicha primera capa (11) absorbente y dicha lámina posterior (9), y en el que la primera capa (11) absorbente tiene una parte delantera (6) longitudinal y una parte posterior (7) longitudinal y una transición (14) transversal estrecha se localiza entre dicha parte delantera (6) y dicha parte poster
