A sensor plaster (116) for the transcutaneous measurement of an organfunction, moreparticularly of a kidney function, is proposed. The sensor plaster (116)comprises at leastone flexible carrier element (134) having at least one adhesive surface (138)which can bestuck onto a body surface. Furthermore, the sensor plaster (116) comprises atleast oneradiation source, more particularly a light source (142), wherein theradiation source isdesigned to irradiate the body surface with at least one interrogation light(162).Furthermore, the sensor plaster (116) comprises at least one detector (146)designed todetect at least one response light (176) incident from the direction of thebody surface.
