The invention relates to an application device for a sensor head, which can be used for example as a component of a measuring arrangement for obtaining measurement signals from living tissue in order to determine the presence, concentration, or material composition of bodily fluids and substances possibly only temporarily vessel-bound. The aim of the invention is to create solutions by means of which it is possible to take non-invasive measurements, in particular spectrometric measurements, in a manner that is advantageous in terms of measurement and ergonomics, in the region of the fingers of a user, in particular a patient. Said aim is achieved according to the invention by an application device for applying a sensor head to a finger of a user, comprising an outer housing, an insert body, which is made of a soft material and sits in the outer housing, wherein the insert body forms a finger-receiving cavern, wherein the outer housing has a rear shell section, a first clamping leg, and a second clamping leg, wherein the two clamping legs can be variably positioned relative to the rear shell section in such a way that the insert body can be deformed in a defined manner between the rear shell section and the two clamping legs.
