To provide a thermistor device capable of rigidly and surely coupling a lead conductor with a terminal board without influencing thermistor characteristics, and to provide its manufacturing method.

The thermistor device includes a thermistor element 10 and the terminal board. The thermistor element 10 has lead conductors, and ends of the lead conductors 14 and 15 are fusion-bonded to the terminal board 20 out of a board surface 21 of the board 20. The manufacturing method of the thermistor device includes steps of aligning in position the ends of the lead conductors 14 and 15 with a part protruding from the board surface 21 of the board 20, and then fusion-bonding the terminal board 20 to the lead conductors 14 and 15.