A sensor for measuring a physiological signal and a method for manufacturing such a sensor. Such a sensor includes a flexible substrate and at least one electrode, which has a signalling surface, which faces in the same direction as the first surface of the flexible substrate. In addition, the sensor includes a signal transmission conductor, which is connected electrically to the electrode. The signal transmission conductor is attached in a watertight manner to the second surface of the substrate. The sensor is reliable, economical to manufacture, and comfortable to the user.
