Filling head

The invention relates to a filling head for introducing a working fluid into a working fluid tank of a motor vehicle, comprising: a filling head housing having a supply receiving region; the invention relates to a filling head comprising a filling head housing having a supply receiving region, a venting structure, in which the supply receiving region has an insertion nozzle extending along a virtual nozzle path, which insertion nozzle has an insertion opening through which the receiving space is accessible, a magnet arrangement being arranged in the filling head housing at an axial magnet distance from the insertion opening, the venting structure comprising a channel arrangement, the channel device is delimited by an inner wall of the insertion connection tube and by an outer wall of the insertion connection tube, characterized in that a gas-impermeable boundary surface, which delimits the receiving space radially outward, extends from the insertion opening into an extension region of the magnet device, a cro