The invention relates to a filling nozzle for dispensing a liquid into a tank of a motor vehicle, having a main valve (5). It is provided according to the invention that a safety valve (7) is arranged downstream of the main valve (5), which safety valve can be moved from a closed position into an open position by means of an opening movement directed in an upstream direction, and that a safety device (11) is provided which has an operative connection to the safety valve (7) and which is designed to detect the insertion of the filling nozzle into a tank provided for the corresponding liquid and which effects a movement of the safety valve from the closed position into the open position when an insertion of the filling nozzle into a tank provided for the corresponding liquid is detected.