Sensor and guide wire assembly (1； 21) for intravascular measurement of physical variables inside a living body and comprises a proximal end portion (2； 22) and a sensor element (9； 29), which is located in a distal portion of the sensor and guide wire assembly (1； 21), and is characterized in that a proximal tube (3； 23) is provided, which extends from said proximal portion (2； 22) to a proximal end of a hollow stranded wire (4； 24), which extends to the distal end portion wherein the sensor element (9； 29) is located.
