System for traceability of transport of containers of biological samples, arranged in a containment rack, from a drawing point to an analysis point, each of said containers of biological samples and each of said containment racks being provided with a univocal identifier, said system comprising: - at least a preparation apparatus arranged at said drawing point and comprising a first identification device for identifying containment racks and a first measurement device for measuring the mass of containment racks; - at least one check-in apparatus arranged at said analysis point and comprising a second identification device for identifying containment racks and a second measurement device for measuring the mass of containment racks; - a centralized database operatively connected to said preparation apparatus and to said check-in apparatus and able to store data related to said containers of biological samples and to said containment racks; characterized in that said preparation apparatus is able, for each of said containment racks going out from said drawing point, to identify said containment rack by means of said first containment racks identification device, to detect the measurement of the mass of said containment rack going out from said drawing point, by means of said first measurement device for measuring the mass of containment racks, and to store in said centralized database said measurement of the mass going out from said drawing point, and in that said check-in apparatus is able, for each containment rack coming to said analysis point, to identify said containment rack by means of said second containment racks identification device, to detect the incoming measurement of the mass of said containment rack by means of said second measurement device for measuring the mass of containment racks, and to compare said measurement of the mass going out from said drawing point as stored in said centralized database with said incoming measurement of the mass at said analysis point, generating an alert if said measurement of the mass going out from said drawing point is different from said incoming measurement of the mass at said analysis point. - at least a preparation apparatus arranged at said drawing point and comprising a first identification device for identifying containment racks and a first measurement device for measuring the mass of containment racks; - at least one check-in apparatus arranged at said analysis point and comprising a second identification device for identifying containment racks and a second measurement device for measuring the mass of containment racks; - a centralized database operatively connected to said preparation apparatus and to said check-in apparatus and able to store data related to said containers of biological samples and to said containment racks; characterized in that said preparation apparatus is able, for each of said containment racks going out from said drawing point, to identify said containment rack by means of said first containment racks identification device, to detect the measurement of the mass of said containment rack going out from said drawing point, by means of said first measurement device for measuring the mass of containment racks, and to store in said centralized database said measurement of the mass going out from said drawing point, and in that said check-in apparatus is able, for each containment rack coming to said analysis point, to identify said containment rack by means of said second containment racks identification device, to detect the incoming measurement of the mass of said containment rack by means of said second measurement device for measuring the mass of containment racks, and to compare said measurement of the mass going out from said drawing point as stored in said centralized database with said incoming measurement of the mass at said analysis point, generating an alert if said measurement of the mass going out from said drawing point is different from said incoming measurement of the mass at said analysis point.