Mechanism for introduction/extraction of a basket inside a treatment tank, which makes it possible to raise and lower a basket (2) with the utensils to be treated, without effort and without risk for the operator, by means of a frame (1) which together with the basket is liftable/descending by means of belts (6) driven by shafts associated with engines located in chambers (7) provided at the mouth of the tank. (Machine-translation by Google Translate, not legally binding)Mecanismo para introducción/extracción de una cesta en el interior de un tanque de tratamiento, que posibilita la elevación y descenso de una cesta (2) con los utensilios a tratar, sin esfuerzo y sin riesgo para el operario, mediante un marco (1) que junto con la cesta es elevable/descendente por medio de unas cintas (6) accionadas por ejes asociados a motores situados en unas cámaras (7) previstas en la embocadura del tanque.