A conductivity sensor having a sensor housing and a sensor element, the sensor element having at least a first electrode and a second electrode, the first electrode is impinged during operation by a current or voltage signal via a first feed line, the second electrode is impinged during operation by a current or voltage signal via a second feed line, and the first feed line and/or the second feed line is/are arranged in the sensor housing, and the conductivity sensor has a longitudinal axis. To provide a conductivity sensor which has a particularly high measuring range is achieved in that at least one fixing element is provided, the at least one fixing element being arranged inside the sensor housing and in that the first feed line and/or the second feed line is/are fixed in their position by the at least one fixing element.