An automatic blood sampling tube preparation device comprising at least two sections containing blood sampling tubes (2a-2d), each section being intended to contain blood sampling tubes of the same class, a means to transfer (3) to selectively select a blood sampling tube required for an analysis of a patient according to an instructional information indicated by the physician from the section containing tubes for the collection of blood samples and transfer the chosen blood sampling tube to an adhesive bonding position (X), a means of printing and bonding adhesive (10) to print a patient information on an adhesive and paste the printed adhesive on the blood sampling tube positioned in the adhesive bonding position, and a control means (40) for controlling the operations of each medium characterized by the fact that the device The automatic preparation of blood sampling tubes (1) additionally comprises a photographic means (30) for photographing an aspect of the blood sampling tube (ad) chosen from the section containing sampling tubes of blood samples (2a-2d), and said control means (40) is arranged to have a limit with respect to at least one characteristic information previously extracted from an aspect of a blood sampling tube (ad ), to extract the characteristic information from the photographed aspect image by means of the photographed medium (30), to specify the class of the blood sampling tube (ad) chosen from the section containing shot tubes of blood samples (2a-2d) based on the limit and the characteristic information extracted, and estimate whether the blood sampling tube (ad) corresponds to the physician's instructional information.Un dispositivo de preparación automático de tubos de toma de muestras de sangre que comprende al menos dos secciones que contienen tubos de toma de muestras de sangre (2a-2d), estando destinada cada sección a contener tubos de toma de muestras de sangre de una misma clase, un medio para transferir (3) para escoger de manera s
