A terminal head, which is provided in a sheath type temperature sensor and is for connecting the sheath type temperature sensor and a cable, is structured such that, in order for replacement of the sheath type temperature sensor to be easily performed and in order to minimize the number of replacement parts, a terminal plate (2) of the terminal head (1) and the sheath type temperature sensor 3 are coupled using a pair of plug-in connectors (4, 5) and the coupling is held by a coupling nut (6). When replacing the sheath type temperature sensor (3), the leads (31) of the sheath type temperature sensor do not need to be detached from and attached to the terminal plate (2) at the replacement worksite, and the only replaced part other than the sheath type temperature sensor (3) is the one connector (5).