To provide an electron beam sterilization apparatus which utilizes the irradiation with an electron beam, which facilitates the simplification of the structure of a conveyance part installed inside a radiation shielding tunnel, removal of bacteria sticking to a conveyor, a guide roller or the like, and the control of hygiene controlled.

This electron-beam sterilization apparatus 50 is provided with a radiation shielding tunnel 16 which has a nearly circular passage is provided, an object to be irradiated conveyor which is installed along a curved passage, and an electron-beam irradiation chamber 17 which is installed in the halfway part of the passage of the radiation shielding tunnel 16. A radiation which is generated due to the irradiation with an electron beam inside the electron- beam irradiation chamber is reflected inside the curved passage inside the shielding tunnel so as to change its direction, and it is scattered and attenuated. A leakage radiation from the entrance of the shielding tunnel 16 is attenuated to a tolerance level or lower. An opening and shutting door by which the passage is opened is installed at least in a part of the shielding tunnel 16.