Abstract: The invention relates to a device for the repeated piercing of a skin, with a hand-held device (1), which has a drive module (2) with a drive unit (4) that is configured for the purpose of producing a driving force, and a needle module (3) in which a piercing apparatus (6) is moveably located in the longitudinal direction of the needle module (3) and which is detachably coupled to the drive module (2) in such a way that the driving force is conducted into the piercing apparatus (6), wherein the needle module (3) has identification means (14) which can be evaluated with an evaluation apparatus (13) allocated to the identification means (14) and enclosed by the drive module (2). Furthermore, the invention relates to a needle module as well as a method for assembling the hand-held device.