In the blood-sampling-tube preparation device according to the present invention, the each blood-sampling-tube containing section is provided with a number of compartments along a periphery thereof, in which the blood-sampling-tubes are contained one by one in a laying state, and an opening portion at a lower portion thereof for discharging the blood-sampling-tube from the each compartment, the compartments in each of the blood-sampling-tube containing section are intended to be moved in a peripheral direction thereof so that the blood-sampling-tube contained in the compartment aligned with the opening portion falls through the opening portion by moving the compartments at a suitable distance along the peripheral direction, and the blood-sampling-tube transferring means is arranged under the opening portions of the blood-sampling-tube containing sections for receiving the blood-sampling-tube felt from the each blood-sampling-tube containing section. Therefore, it is not necessary to provide a complicated mechanism for taking out the blood-sampling-tube from the blood-sampling-tube containing section. And therefore, the blood-sampling-tube preparation device can be structurally simplified and miniaturized (FIG.2).
