Abstract: A plain bearing includes a support base which carries a sliding layer and is supported in a bearing housing. For locally determining the temperature of the sliding layer, a heat conductor is inserted in the support base which transmits the heat to a temperature sensing and measuring element located in the bearing housing. The heat conductor is positioned in a plug and surrounded therein by a sheathing. In order to provide an intimate contact between the heat conductor and the temperature sensing and measuring element, the latter is biased by a spring in direction to the heat conductor. By means of guide tracks, the support base can be turned into the bearing housing as the element will be retracted by the guide track against the force of the spring and runs along the circumference of the support base until being in alignment with the heat conductor.