Provided are a vegetable sterilization apparatus and a method for production of sterilized vegetables, with which leakage of ozone gas to the outside is more reliably preventable, while minimizing ozone gas desorption. The vegetable sterilization apparatus (100) is provided with a sterilization tank (3) for sterilizing vegetables (V) through immersion in ozone water, and a compartment (30) above the ozone water held in the sterilization tank (3) is airtight. This method for production of sterilized vegetables is carried out in an ozone water sterilization tank (30) in which ozone water is held and the space above the ozone water held therein is airtight, and includes: a sterilization step for immersing vegetables in ozone water and carrying out sterilization an air feed step for increasing the pressure inside a pre-wash tank (20) and a post-wash tank (40) provided as a previous stage and a subsequent stage of the ozone water sterilization tank (30), to a level above the pressure inside the ozone water sterilization tank (30) and a transport step for transporting the vegetables between the ozone water sterilization tank (30), and the pre-wash tank (20) and the post-wash tank (40) that were brought to elevated pressure in the air feed step.Linvention concerne un appareil de stérilisation de légumes et un procédé de production de légumes stérilisés, qui permettent de prévenir de façon plus fiable la fuite dozone gazeux vers lextérieur tout en minimalisant la désorption dozone gazeux. Lappareil (100) de stérilisation de légumes comporte un réservoir de stérilisation (3) pour stériliser des légumes (V) par immersion dans de leau ozonisée, et un compartiment (30), qui se situe au-dessus de leau ozonisée contenue dans le réservoir de stérilisation (3) et est étanche à lair. Le procédé de production de légumes stérilisés est mis en oeuvre dans une cuve (30) de stérilisation à leau ozonisée, dans laquelle leau ozonisée est contenue, lespace se situant au-dessus de leau ozoni
