To provide a filling nozzle system enabling a filling nozzle to be washed and sterilized while remaining attached without being disassembled.

The filling nozzle system of an automatic packaging machine includes a filling nozzle 8 casting a content into a bag made by heat-sealing a bag-like molded packaging film, a sterilizer recovery nozzle 60 washing and sterilizing the filling nozzle 8 while remaining attached to the automatic packaging machine without being disassembled, and a sterilizer supply device spraying the sterilizer into the filling nozzle 8 in case of conducting the washing and sterilizing motion. The sterilizer sprayed from the sterilizer supply device is discharged via the sterilizer recovery nozzle 60 to the outside of the automatic packaging machine by connecting and fixing a protrusion member 53 mounted at the tip end of a filling pipe 52 of the filling nozzle 8 to the sterilizer recovery nozzle 60. The inside of the filling nozzle 8 is washed and sterilized in this manner.