The invention relates to a lancing system, comprising test elements, lancing elements, test elements each assigned to a lancing element and a hand-held device comprising a holder, which during a puncture holds a lancing element and a test element assigned to it, a lancing drive, which during a puncture moves the holder out of a starting position into a piercing position and back into the starting position, a light-sensitive sensor for analyzing a body fluid sample taken up by a test element, and a light source for illuminating the test element. According to the invention, the sensor is disposed in a housing, the outside of which the holder touches in the starting position.