Abstract: A lancet activating device comprising a housing (3) which houses a reciprocating spring-loaded plunger (17), serving as a trigger to activate a lancet (26); cavity (5,6) for placements of a lancet (26) and a finger (23); apertures (9, 7) for the insertion of said lancet and said finger; leaf-spring (10) to position a finger (23). An unactivated fresh lancet (26) is inserted into the cavity (6) of the lancet activating device and the patient's finger (23) is placed into the cavity (5), whereby the finger positioning will be determined by the leaf-spring (10). At a press of the top mounted reciprocating plunger (17), the lancet (26) is activated to puncture the finger (23) and the patient proceeds to withdraw his finger and collection of the micro blood sample can proceed. Thereafter a fresh lancet (26) can be inserted into the cavity (6) of the lancet activating device from the lancet insertion aperture (9).