<p>[PROBLEMS] To increase the reliability of a thermal sensor by constructing a protective structure capable of protecting a ferroelectric substance from an external environment when the ferroelectric substance is used as the thermal sensing element of the thermal sensor. [MEANS FOR SOLVING PROBLEMS] This thermal sensor comprises a heat sensing part (11) sensing heat in a monitoring area and a casing (81) fixing the heat sensing part (11). The heat sensing part (11) is fixed to the casing (81) through a laminate part (60) for protecting the heat sensing part (11).</p>
