Abstract: A blood extraction device includes a hollow, cylindrical receptacle which is open at one end with a double-ended hollow needle at its other end, into which an evacuated blood sample tube is inserted. The blood sample tube is closed by means of a screw-attachment cap, whereby the cap retains a sealing membrane against the blood sample tube in order to close it tightly. A device for evacuation of blood sample tubes is provided. A second needle may be provided at the closed end of the receptacle, via which needle the inserted blood sample tube may be connected with a suction line, which is formed, in one embodiment, by a compressible elastic balloon and a valve.