Provided is a shield used for container sterilization equipment that inserts, from the mouth of a container (B), an irradiation nozzle (En) having an exit window (Ew) on the distal end of the irradiation nozzle (En) and sterilizes the inner surface of the container (B), the irradiation nozzle (En) being surrounded by composite shields (Wi, Wo). A composite shield block (21) forming the composite shields (Wi, Wo) includes a magnetic shield (24) and an X-ray shield (25) that are disposed in the hollow section of a board-shaped shell (22) made of a corrosion resistant material, and an insulating layer (26) that is interposed between one surface of the board-shaped shell (22) and the magnetic shield (24), between the magnetic shield (24) and the X-ray shield (25), and between the X-ray shield (25) and one surface of the board-shaped shell (22).
