An external terminal device for permanent catheters, comprising a reservoir that can be connected, on the one hand, at least to a catheter (2； 52, 53) and, on the other hand, to a closure cap (20) containing a material (73) absorbent and disposable impregnated by an antiseptic substance, characterized in that said reservoir houses two sockets (26, 27； 66, 67) provided with buttons (8, 9) that can be operated from outside the reservoir and which has, by on the one hand, first connectors (23； 65) for connection to the catheters (2； 52, 53) and, on the other hand, second connectors (12, 13) that project from the tank for connection with external equipment, the first connectors (23； 65) being connected to the catheters (2； 52, 53) by at least one coupling (4) leaving the tank and externally holding a subcutaneous ring (3) designed to be placed in the subcutaneous tissue of the patient body, the second connectors being provided (12, 13 ) of caps (14, 15) surrounded by the absorbent and disposable material (73) that is received in the closure cap (20) and has spaces (16, 17) to accommodate the caps (14, 15) so that the material (73) absorbent adheres to the caps to protect them externally from a bacterial attack by the antiseptic substance with which it is impregnated.Un dispositivo terminal externo para catéteres permanentes, que comprende un depósito que puede conectarse, por un lado, al menos a un catéter (2； 52, 53) y, por otro lado, a una tapa de cierre (20) que contiene un material (73) absorbente y desechable impregnado mediante una sustancia antiséptica, caracterizado por que dicho depósito aloja dos tomas (26, 27； 66, 67) provistas de botones (8, 9) que pueden hacerse funcionar desde fuera del depósito y que tiene, por un lado, primeros conectores (23； 65) para la conexión con los catéteres (2； 52, 53) y, por otro lado, segundos conectores (12, 13) que se proyectan desde el depósito para la conexión con un equipo externo, conectándose los primeros conectores (23；
