A sterilizer-filler nozzle assembly for an aseptic packaging machine comprisesa formsection 40, a product supply duct that has a product outlet portion 4 whichliesdownstream of a distal end of the form section 40, a sterilization mediumsupply ductthat has a sterilization medium outlet portion 16 which lies between thedistal end ofthe form section 40 and the product outlet portion 4, and an exhaust duct thathas anexhaust inlet portion 22 which lies between the distal end of the form section40 andthe product outlet portion 4. A gas supply duct is provided that has a gasoutletportion 10 which lies between the sterilization medium outlet portion 16 andtheproduct outlet portion 4.