<p>The chip PTC thermistor of the present invention is capable of increasing the rate of increase in resistance when an overcurrent is applied, thereby increasing the withstand voltage. The PTC thermistor comprises: a first main electrode 12a and a first sub-electrode 12b disposed on a first face of a conductive polymer 11 with PTC properties; a second main electrode 12c and a second sub-electrode 12d disposed on a second face of the conductive polymer 11, which is facing the first face; and first and second side electrode 13a and 13b disposed on side faces of the conductive polymer 11. Cut-off sections 14 are provided to the vicinity of joints of the first main electrode 12a and the first side electrode 13a, and joints of the second main electrode 12c and the second side electrode 13b. <IMAGE></p>
