To solve the problem that a high molecular thermosensitive material satisfying all the requirements of electrical characteristics, heat-resistant stability, a thermo-fuse function, moisture resistance or the like has not been obtained for thermosensitive devices which control the temperature of electric warming apparatuses.

Since a polyamide composition in which a polyamide-polyether copolymer, a conductive imparting material and a coupling reinforcement are compounded with the high molecular thermosensitive body is used and the coupling of the conductive imparting material and the polyamide-polyether copolymer is increased by the coupling reinforcement, the high molecular thermosensitive body satisfying moisture-resistant characteristics, electrical characteristics, mechanical strength, heat-resistant stability, the thermo-fuse function and fabricating properties can be obtained, without deteriorating conductive characteristics, even when the polyamide-polyether copolymer having low hydroscopicity is used.