It is an object of the present invention to provide a blood-sampling-tube automatic preparation device having a quite short width and a superior portability, and being very compact. The blood-sampling-tube automatic preparation device according to the present invention, comprising a blood-sampling-tube containing section (B) having at least two blood-sampling-tube containers (1) each of which are able to contain separately blood-sampling-tubes according to a kind of blood-sampling-tube, a label printing and pasting unit (E) that prints a blood sampling information data related to a patient on a label and then pastes the printed label on a surface of a blood-sampling-tube, a hand pasting label printer (F), a blood-sampling-tube collecting section (G) in which one or more blood-sampling-tubes with label pasted and , if necessary, one or more printed labels for hand pasting are collected for each patient, a blood-sampling-tube transferring device (C, D) that receives the blood-sampling-tube required to a blood test of a patient from the corresponding blood-sampling-tube container (1) and transfers the received blood-sampling-tube to the label printing and pasting unit (E), and a control device (70) that controls the each component (B to G) such as one or more blood-sampling-tubes required to the blood test of the patient are selectively taken out from the corresponding blood-sampling-tube container (1), the information data corresponding to the patient is printed on the label, the printed label is pasted each blood-sampling-tube, if necessary, the information data corresponding to the patient is printed on the label for hand pasting, and then one or more the label pasted blood-sampling-tubes and, if necessary, one or more labels for hand pasting are collected in the blood-sampling-tube collecting section (G) for each patient characterized in that all blood-sampling-tube containers (1) of the blood-sampling-tube containing section (B) are arranged side by side in a row
