A sterilization box seal device including a shaft capable of being slid into a closure device of a sterilization box, and a support part of the proximal end of shaft, which includes a locking element irreversibly capable of cooperating and attaching on the distal end of shaft so as to form therewith a closed loop preventing the closure device from opening, such that the support part includes an additional part to the support one necessary for the sole seal function, the additional part includes an area capable of receiving a readable identification label.