Abdominal postural reeducation characterized by having means to adapt to the contour of the abdomen by means of an elastic band (2) fixed to the postural reeducation device (1) by means of a fixed ring (9) and a sliding ring (3) having a configuration of buckle allowing the tension and fixation of this end of the band, the device has an element that warns its carrier when there is a tension in the elastic band derived from abdominal distension, this device consists of a vibrating motor, the activation of the vibrating motor (8) comes from the activation of a push button switch (6) when pressed during sliding of the sliding ring (3) when the abdomen is distended, deactivating when the abdomen retracts releasing the pressure on the push button switch, this movement is aided by an elastic spring (11), to limit the movement, the sliding ring (3) has stops (4); the abdominal postural reeducation has a control circuit (12) containing at least one time base to set the time frame in which the user has relaxed the abdomen and its duration, as well as at least one memory to store this data and means to transmit this information to an external device such as a Smartphone or a personal computer such as Wifi or bluetooth. (Machine-translation by Google Translate, not legally binding)1. Reeducador postural abdominal caracterizado por disponer de medios para adaptarse al contorno del abdomen mediante una banda elástica (2) fijada al dispositivo de reeducación postural (1) mediante una anilla fija (9)y una anilla deslizante (3) que presenta configuración de hebilla permitiendo el tensado y fijación de este extremo de la banda, el dispositivo presenta un elemento que avisa a su portador cuando existe una tensión en la banda elástica derivada de la distensión abdominal, este dispositivo consiste en un motor vibrador, la activación del motor vibrador (8) proviene de la activación de un interruptor pulsador (6) al ser pulsado durante el deslizamiento de la anilla deslizante (3) cuando