Abstract: The aim of this paper is to present an instrument that helps to create a subcutaneous path for central catheters used for hemodialysis, as well as a non traumatic internal introduction of Tesio's catheters and other systems (Dacron cap). We have designed a tunneling tool which consists of a solid but light weight hand set, connected to an extension that ends with an olive shape dilator to be connected to a trocar. Thus, precise tunneling is guaranteed through a non traumatic procedure, allowing exact anchorage of catheters.