The system has an analytical aid (1) including a test unit (4) with a test field (5) for analyzing a liquid sample. A coupling unit (7) is successively connected to a lancet (3) of the analytical aid in a position of the analytical aid and to the test unit in another position of the analytical aid. A drive unit (8) moves the coupling unit from a resting position (22) to a moving position such that the movement of the coupling unit is transmitted to the lancet for executing a puncturing movement, or is transmitted to the test unit for executing a sample-collecting movement. An independent claim is also included for a method for collecting a liquid sample in a sample collecting system by an analytical aid.
