Filler device

A filling device for a metal tank, comprising a filling tube (1) and a coupling element (2) for connecting the filling tube (1) to the metal tank, wherein the filling tube (1) is a plastic tube and the coupling element (2) is a metal part, wherein the plastic tube is shrink-fitted onto a tube connection section (3) of the metal part, a tank device comprising such a filling device and a method for manufacturing such a filling device.