A system for preserving a surgically explanted tissue sample, comprising: - a plurality of containers (C1, C2, C3, C4) of different sizes - a first packing station for placing the tissue sample in a selected container among the plurality of containers (C1, C2, C3, C4) of different sizes, the first packing station including a control electronic processor, a volumetric sensor for the measurement of the volume of the tissue or another organ surgically explanted, a first printer configured to automatically generate a first bar code label identifying all the patient's data and the program selected for the correct packing of the surgically explanted tissue sample, a first bar code reader configured to verify the correct identification of the bar code label on the container, a cabinet on whose shelves are the plurality of containers (C1, C2, C3, C4) of different sizes having hermetic lids; and - a final packing station comprising a filling system for filling the selected container with a fixative-preservative substance, the filling system including a nozzle-holding head mounted movable on a vertical guide, the nozzle-holder head having at least one nozzle for filling the selected container, a second printer configured to automatically generate a second bar code label, thereby automatically inserting the date and time of packing, wherein the label is for affixing to the selected container, characterized in that the hermetic lid of the selected container is provided with an opening equipped with a non-return valve and the at least one nozzle is configured to be inserted in the non-return valve, the control electronic processor is configured to prescribe the volume of the container (C1, C2, C3 or C4) to be used for storing the tissue and configured to deliver the right amount of fixative-preservative solution necessary for a correct fixation, the first packing station further comprises an electronic device in which a software for the selection of a container from the plurality of containers (C1, C2, C3, C4) based on the volume of the explanted tissue sample is installed. - a plurality of containers (C1, C2, C3, C4) of different sizes - a first packing station for placing the tissue sample in a selected container among the plurality of containers (C1, C2, C3, C4) of different sizes, the first packing station including a control electronic processor, a volumetric sensor for the measurement of the volume of the tissue or another organ surgically explanted, a first printer configured to automatically generate a first bar code label identifying all the patient's data and the program selected for the correct packing of the surgically explanted tissue sample, a first bar code reader configured to verify the correct identification of the bar code label on the container, a cabinet on whose shelves are the plurality of containers (C1, C2, C3, C4) of different sizes having hermetic lids; and a control electronic processor, a volumetric sensor for the measurement of the volume of the tissue or another organ surgically explanted, a first printer configured to automatically generate a first bar code label identifying all the patient's data and the program selected for the correct packing of the surgically explanted tissue sample, a first bar code reader configured to verify the correct identification of the bar code label on the container, a cabinet on whose shelves are the plurality of containers (C1, C2, C3, C4) of different sizes having hermetic lids; and - a final packing station comprising a filling system for filling the selected container with a fixative-preservative substance, the filling system including a nozzle-holding head mounted movable on a vertical guide, the nozzle-holder head having at least one nozzle for filling the selected container, a second printer configured to automatically generate a second bar code label, thereby automatically inserting the date and time of packing, wherein the label is for affixing to the selected container, a filling system for filling the selected container with a fixative-preservative substance, the filling system including a nozzle-holding head mounted movable on a vertical guide, the nozzle-holder head having at least one nozzle for filling the selected container, the filling system including a nozzle-holding head mounted movable on a vertical guide, the nozzle-holder head having at least one nozzle for filling the selected container, a second printer configured to automatically generate a second bar code label, thereby automatically inserting the date and time of packing, wherein the label is for affixing to the selected container, the hermetic lid of the selected container is provided with an opening equipped with a non-return valve and the at least one nozzle is configured to be inserted in the non-return valve, the control electronic processor is configured to prescribe the volume of the container (C1, C2, C3 or C4) to be used for storing the tissue and configured to deliver the right amount of fixative-preservative solution necessary for a correct fixation, the first packing station further comprises an electronic device in which a software for the selection of a container from the plurality of containers (C1, C2, C3, C4) based on the volume of the explanted tissue sample is installed.