To provide a thermal protector that can realize capacity expansion in a relatively small size.

A fixed electrode assembly 2 and a movable electrode assembly 3 face each other and have been sealed so as to enable contact and separation in a glass container 1. The fixed electrode assembly 2 consists of an conductive plate 4, a fixed-side contact 5 provided at an end of the plate 4, and a fixed-side inner lead 6 connected to the other end of the plate 4. Also, the movable electrode assembly 3 consists of a thermally actuated element 7, a movable-side contact 8 provided at an end of this thermally actuated element 7, and a movable-side inner lead 9 connected to the other end of the element 7.