The invention concerns a medical puncture instrument for the relocation of drains and catheters, in order to initiate and/or channel the fluid in the body, whereby its components are already assembled, so that an immediate usage capable instrument is delivered in a sterile packaging. The puncture instrument consists at least of a puncture tube, a handling medium for maneuvering of puncture tube and a longitudinal movable cylindrical body enclosed in the puncture instrument. In a further arrangement, the puncture instrument consists of a lock chamber for the introducing or rather the suction of the fluid. For the fixation of the cylindrical body in a desired position in the puncture instrument, a braking element can be incorporated. The handling element is open in a section, so that the cylindrical body here lies free and can be suspended.
