[Object] An object of the present invention is to provide an automatic blood-sampling tube preparation device which can detect the mistake in the kind of blood-sampling tube. [Means of Realizing the Object] An automatic blood-sampling tube preparation device according to the present invention being constituted so as to selectively take out a blood-sampling tube required to an examination of a patient according to an instruction information indicated by a doctor from the blood-sampling tube containing section, transfer the taken-out blood-sampling tube to a label pasting position, print an information of the patient on a label, paste the printed label on the blood-sampling tube positioned in the label pasting position, and collect the label pasted blood-sampling tubes in the container for each patient, characterized in that the automatic blood-sampling tube preparation device further comprises a photographing means for photographing an appearance of the blood-sampling tube taken out from the blood-sampling tube containing section and a control means, and said control means is arranged to have a threshold with respect to at least one characteristic information previously extracted from an appearance of a blood-sampling tube, to extract the characteristic information from the appearance image photographed by the photographing means, to specify the type of the blood-sampling tube taken out from the blood-sampling tube containing section on the basis of the threshold and the extracted characteristic information, and to judge whether the blood-sampling tube corresponds to the instruction information from the doctor.
