To make small a body part of a temperature fuse with resistor and make compact a protection board for protecting a secondary battery on which the temperature fuse with resistor is mounted.

A fuse element 3 is arranged over membrane electrodes a, b on both sides on one surface of a substrate and an intermediate membrane electrode 2, tips of belt-like lead conductors A, B are joined to the membrane electrodes a, b, one side of the substrate is covered with an insulating sealer 5, a membrane resistor r is arranged over the front and rear membrane electrodes 41, 42 on the other surface of the substrate, and one membrane electrode 42 is electrically connected to the intermediate membrane electrode 2, the tip part of a belt-like lead conductor C is joined in a surface contact state to a side part c of the other membrane electrode 41, a step e rising to the other surface of the substrate is formed in a portion approaching the edge end of the substrate of the belt-like lead conductors A, B, and the height difference between the upper side surface of the step and the other surface of the substrate is made almost equal to the thickness of the belt-like lead conductor C.