A beverage filling apparatus comprising: a molding section for molding a bottle from a heated preform through a blow molding process; an inspection section for inspecting the bottles a sterilization section for sterilizing the bottle molded in the molding section with hydrogen peroxide mist or hydrogen peroxide gas; a filling section for filling the bottle sterilized in the sterilization section with beverage (a) and then sealing the bottle, the molding section, the sterilization section and the filling section being coupled continuously with each other; bottle travelling means disposed for continuously travelling the bottle on a travelling path from the molding section to the filling section through the sterilization section, the bottle travelling means being provided with wheels (19a, 19b, 36a, 36b, 36c, 58a, 58b, 58c, 58d) disposed in a row from the molding section toward the filling section; grippers turning around the wheels while gripping the bottle neck portion and transferring the bottle from an upstream side wheel to a downstream side wheel; a chamber for covering a portion from the sterilization section to the filling section; an air exhaust means coupled to an entrance side of the chamber which covers the sterilization section, thereby the air with hydrogen peroxide mist or hydrogen peroxide gas is exhausted out of the chamber by the air exhaust means, wherein an atmosphere shutoff chamber is disposed between a chamber of the inspection section and the chamber of the sterilization section, wherein partition walls (80,81) are disposed, respectively between the chamber of the inspection section and the atmosphere shutoff chamber and between the atmosphere shutoff chamber and the chamber of the sterilization section, and wherein an air exhaust, as air exhaust means, is coupled with the atmosphere shutoff chamber. a molding section for molding a bottle from a heated preform through a blow molding process; an inspection section for inspecting the bottles a sterilization section for sterilizing the bottle molded in the molding section with hydrogen peroxide mist or hydrogen peroxide gas; a filling section for filling the bottle sterilized in the sterilization section with beverage (a) and then sealing the bottle, the molding section, the sterilization section and the filling section being coupled continuously with each other; bottle travelling means disposed for continuously travelling the bottle on a travelling path from the molding section to the filling section through the sterilization section, the bottle travelling means being provided with wheels (19a, 19b, 36a, 36b, 36c, 58a, 58b, 58c, 58d) disposed in a row from the molding section toward the filling section; grippers turning around the wheels while gripping the bottle neck portion and transferring the bottle from an upstream side wheel to a downstream side wheel; a chamber for covering a portion from the sterilization section to the filling section; an air exhaust means coupled to an entrance side of the chamber which covers the sterilization section, thereby the air with hydrogen peroxide mist or hydrogen peroxide gas is exhausted out of the chamber by the air exhaust means, wherein an atmosphere shutoff chamber is disposed between a chamber of the inspection section and the chamber of the sterilization section, wherein partition walls (80,81) are disposed, respectively between the chamber of the inspection section and the atmosphere shutoff chamber and between the atmosphere shutoff chamber and the chamber of the sterilization section, and wherein an air exhaust, as air exhaust means, is coupled with the atmosphere shutoff chamber.