An electron beam irradiation apparatus that emits an electron beam into a container, the electron beam irradiation apparatus including: a vacuum housing constituting a vacuum chamber an electron generator provided in the vacuum housing a cylindrical nozzle member that is extended from the vacuum housing so as to be inserted into the container and has exit windows on the distal end of the nozzle member, the exit windows being provided for emission of an electron beam generated by the electron generator into the container and a magnetic shield member for the vacuum chamber and a magnetic shield member for the nozzle member, the magnetic shield members being respectively provided for the vacuum housing and the nozzle member so as to block variable magnetism generated around an electron beam trajectory extended from the electron generator to the exit windows.
